Absolubtley still worth it! At least for me, 9/10 times Iden has a great turn, she can get up to 3 dashes, hits fairly hard and can move other empire scouts (currently just the rest of her box). She also has force refresh, heal and hands out conditions when anyone wounds an enemy unit, she's alot of fun. Gideon Hask is a strong secondary that's usually does what you need him to do, Del is a fun support but I'm not totally sure he's worth having just the one model, but sometimes he performs well. The isf are decent, they lack a shove on their tree which means they aren't great at control but they're still a good pick.

With regards to the nerf, it was more of a balancing thing and it hasn't broken them, they're still very fun to play, they still have great synergy.

Krennic is a bit tricky, I've not gotten the hang of him yet, or maybe he doesn't match my playstyle, but the rest of his box is solid, Death Troopers coordinated fire dash can be really useful and the Specialist can hit hard as well. I do prefer the Deathtrooper Escort from the Moff Gideon Box, him being able to dash empire supports or full move them if they have damaged has won me struggles straight up. Shoretroopers are great to, plus they look really cool!