TW3's combat was easy as hell, which also was its biggest flaw. I guess the same applies to PS:T too. Of course both games' combat had major issues, but being easy is probably the single greatest sin an RPG combat system can commit — not only does it make combat a complete waste of everyone's time but it also makes character development and itemization utterly pointless.
Even if the game was more challenging with better encounter design the game systems would have still been trash. The horrible, bloated itemization and enemies whose power is dependent on the level is MMO inspired crap that has no place in single player games.
Level 50 dogs and nekkers coexisting with level 5 gargoyles and level 3 royal wyverns is some crappy ass world design. Or forging a legendary sword that turns out to be junk because you're overleveled when you receive it.
In that regard PST is miles ahead of Twitcher 3 or any other modern RPG.
In that regard The Witcher 1 is miles ahead of its sequels
Few games can match it's simple but elegant and impactful itemization. You really appreciated equipment upgrades and some were connected to the story. Character development was not perfect due to the ARPG nature of the game and arbitrary split between six fighting styles... but still miles ahead of Witcher 2&3.
Regarding PST, its combat is cheesy AF & easy... but I found it quite fun.
Unlocking various OP abilities and butchering enemies with graphic animations. Some of those you had to earn or were exclusive to certain story choices.
Same combat category as Fallout 1 & 2 really, just different emphasis (there it was different weapons and crit gibs).
I enjoyed the combat both in PST and F1&2. In both cases it was a part of a marvelous package.