Yep, the two are still cheap in 2k1. Seth belongs to the all-purpose striker category and can be used in almost any match situation, while strikers like Lin, Xiangfei or Goro need a bit of planning but still are easy to use.
However, the fact that you have to spend a power stock for a striker makes the whole system itself less cheesy than it was in 99 and 2k. In 99, the strikers were harder to use effectively because of various restrictions that were deleted in 2k, and that's still a feature I hate in it because it can get annoying to play against guys who constantly build up their bombs and always go on a striker spamming streak if you tap into one of their damn corner-traps.
There are some really weird glitches in 2k1's striker system, tho. You can call out a striker in two ways by pressing BC while you're standing far, then your chara will show his striker call stance, or you do it after certain moves during a combo which helps to make your combo longer. In this case, the striker stance will be skipped and the striker action takes place immediately, similar to the Quick Max Mode Activation in KoF2k2. All characters have at least one command move or special that is striker-enabled.
However, some characters have two or more moves (mostly multi-hit attacks) that can be followed up with striker calls, so with a bit of practise, you could set up some semi-infinites by chaining two striker-enabled moves and calling out your strikers in a frequency that normally would be impossible according to the basic 2k1 striker rules. I've seen and tried some very cheap 1-player 3-strikers (ratio-3) shit, thank god most of it is limited to showing off in Practice Mode.
Anyway, this ratio-based striker system makes 2k1 deep as hell... I play it every week since release but still find out new ways to use and combine strikers, the possibilities are endless...