Is it possible that a smaller tyranid species might be introduced, hopefully one as a base class (you can choose it without using points). Many of the maps seem designed to confound the larger tyranids, for examples one area on lycantium near one of the last oint, a small hallway where warriors must duck to enter, meaning they become sitting ducks if they try to enter the hall, allowing marines to sit back in relative safety.
I know your adding genestealers soon, is it possible it could be made to be the Tyranid base class with warriors getting a buff and becoming more expensive? Not sure how no ranged weapon would work, but the Warriors aren't all that great at it as is.
Hi silveralen, welcome to the forum. Genestealers are planned to be a basic class option, alongside the warrior class. Tyranid teams should then start a game with a mix of warriors and stealers.
The hallway on Lycantium is the only example of a deliberately "marines only" route that I can think of. Our mappers have taken pains to ensure that tyranids can navigate normally.
I agree the choice of tyranids as the xeno side has presented us with more technical and balance issues than if another humanoid race. Tyranids have been a pain in the ass. I doubt the gameplay would have been nearly as interesting if the xeno side had been Chaos Marines or Orks.