Just readed the forum posts in starcraft2.com
They realy think to cut off Hydralisk.
Really, with massproduction of zerglings and mass control of them (not only 12 as in SC I) - could change the tactics... And Hydralisk well be usless...
Anyway - Hydralisk stays my loved unit and if he cutted out - I just install SC I \ BroodWar and look at hem once again