they can release a stable game that ends up being shit because of it's game systems
Judging by the
Codex's top 7 RPGs, that is highly unlikely
Kotor 2, their inaugural game so to speak, launched in an unfinished state, and to call it a mess is somewhat of an understatement. Despite it's overall quality.
Next game after that, NWN2, launched in yet another horrible state, with a buggy, unoptimized engine, a ridiculously bad campaign and needed extensive patching to even work properly.
Next up, their 2 expansions for NWN2, they redeemed themselves with both being very different but very good D&D experiences.
Only to follow them up with Alpha Protocol, another messy release with less than stellar gameplay.
Despite what New Vegas achieved, its launch was also, rather publicly, a mess... with bugs everywhere and very severe memory leak problems that havent been fixed to this day. Mods managed to add a lot to the game and make the experience much smoother overall, as well as some very good DLC.
But after New vegas, everything went downhill, their Diablo Clone was a spectacular failure, and their South Park game can be accused of everything but being a deep and complex rpg.
So, their game releases are uneven at best. So far PoE is looking great, but looking great and playing great are two very different things, and i think that is why people are clamoring for an extended gameplay video.