As for the Shift-Grab-Punch combo, there have been a number of suggestions, ranging from a cool down on grab time (so that it can't be spammed), to a cool down on the kill animations (to limit fast kill spamming).
I'm torn on these ideas. On the one hand, I get the frustration. On the other hand, though, it is what it is. This game was put together a certain way, and every time they tweak it, it seems to get unbalanced in a different way. If you were to put a cool down on grabbing, then counselors would feel safer ganging up on Jason again. Ditto with the kill cool down.
The real problem is that the game play is simple and straightforward. With a few exceptions, any "advanced" tactics have been exploit based, such as driving the car backwards, morph trapping, body blocking around traps, & etc. That's not to say that the game isn't enjoyable. But it's not exactly rocket surgery.
Anything can become monotonous/boring once you've been doing it a while. That's why people are champing at the bit for new maps, and new counselors. They want to try something new/different. But those are only going to stave off the familiarity for a little while.
This is not a "play every day" kind of game for me anymore. It doesn't have that kind of longevity, IMO. But I still have fun firing it up and playing a few matches once or twice a week. Anything more than that and the act of opening 10 billion empty drawers, spawning in the phone house, and/or having to deal with ridiculous randos starts to wear on me.
TL;DR - Boring is in the eyes of the beholder.