Non-compete clauses are tricky as hell, if you want to actually enforce them (because they brush up against the edge of anti-competition laws, for obvious reasons). They work, sure, but they get very readily struck down unless you can show that you've paid market value for that non-competition clause. ESPECIALLY when there's no geographical limit - it's hard as hell to make a non-compete clause stand up post-sale if it covers an entire nation, let alone having it work internationally.
It's why it's standard to bring the previous owner onto the payroll of the company that's buying it. That's the only 'easy' way of making it work - because you can say that you're actively, currently, paying the guy (in part) not to compete with you. Folding it into the sale contract is theoretically possible (and doable enough if you're just saying the guy can't open a shop with 5km of you), but it's generally deemed a bad risk. Much safer to just hire the damn guy for a couple of years - the clause won't be enforceable beyond than anyway, unless you're paying him way above market value.
The biodocs would have certainly signed non-competes has part of the sale to EA, but they're likely limited to the period in which they on EA's payroll - maybe a couple of years beyond at most (assuming EA likes its contracts to do what they say on the box - which is a pretty dubious assumption, admittedly).
What anti-competition laws are you talking about? In US there are pretty much only anti-trust laws, which only apply to monopolies.
The pre-existing common law (the US has largely the same case law - you guys actively strengthened the pre-existing law in that area compared to UK/Australia, rather than setting it aside). The early cases on striking out non-compete clauses were worried that if taken far enough, they start to become a semi-ownership of another's person's ability to make a living, together with the concern that they're often used as an attempt to gain a temporary monopoly over a certain way of doing business (there's no value in a non-compete clause if there's other parties similarly capable of competing against you in the same manner as the guy signing the clause).
It's why they're treated as matters of degree. If they're territorially restricted (you sell your cafe - the previous owner can't just set up shop round the corner) that's one easy way of solving both problems. Same with restricting by time, and by the scope of the protected activities. But it's a balancing act - the longer you want them to run, the narrower the market you can restrict him from (territorially and product-wise); want him to stay out of that particular product market completely and you've got tighter limits on how long the clause will work for.
But then with a 'sophisticated client', like the Bio-docs, loaded with money and with access to all the legal advice that they could need, courts will give a LOT more scope for enforcing non-competes than if Joe the cafe owner signs one when he sells to Starbucks, so long as you've paid market value for it. Of course, with a sophisticated client, there's a very hefty presumption that market value is going to be whatever the hell they paid, and that's a big barrier to someone like the Biodocs getting it struck out, if EA could argue that there's other competitors with sufficient share of that kind of game.
So in a court case, EA would probably win even if they made a fairly long-term and wide-scope deal. But these contracts (or any good contract, really) isn't about whether you can win in court - you want to close off any situation where there can even BE a legal dispute, because those things cost money. It's not like the Biodocs are completely devoid of legal arguments they could take into court, and there's been strange court decisions in this area before. One well-reported set of cases that scare the hell out of lawyers are when that bunch of long-term recording contracts given to new artists were struck down in the 90s. The main media-reported aspect of that was the unfairness of the contracts (large record company locks in young artist, can't record with someone else without being barred from their old songs, ya de da - nevermind that the companies had paid a very good amount of money to the singers, and that those singers were nobodies and worth virtually nothing to the company when they signed the contracts) but they were, in effect, non-compete clauses - over-turned in an area where there's an absolute surplus of competition, because each contract was unfairly restricting a SINGLE pop singer from competing in that area. Now those are very different cases to the kind of merger/acquisition scenario that we're talking about - but the whole point of the contract process is to ensure that there's zero chance of getting blindsided by that kind of thing.
It's about minimising risk, and with that kind of money on the table, making the contract with even a 5% chance of it exploding in their face is completely and utterly unacceptable. Business execs would initiially go 'we take those risks all the time', but their legal department and the law firm advising them on the acquisition would throw a fit and run through with them what it would end up costing if a fraction of their contracts turned into substantial legal disputes. Especially when they can deal with it by paying a minor fee.