@Amelia
Yes Ada said they'll be moving off Iceshrimp over to Sharkey in the new year, and over time adding back Hajkey functionality like pruning repeats of the same boost, and being able to turn boosts on/off for a timeline.
Those 2 features and to a lesser extent wanting improved follow management with a lot of follows, are the only 3 things I really miss from mastodon when using the Forkeys I've tried so far.