Really not a fan of the removal of undertow, I considered it an core part of Hydroid's identity.
Sure, Hydroid will absolutely be better with this update, but a core part of what made him who he was has been replaced. I was always interested in Hydroid BECAUSE of undertow. I'll wait and see if maybe I like Plunder, but I would honestly have preferred to lose tidal surge and see undertow be brought up to par.