No they wouldn't. but they certainly cant "disrupt" the enemy on the turn they show up either, unless you want to by spinefist, but then no one is going to be overly worried about expensive S3 shots.....
THIS is a major issue, there are very few units in the book that work naked, and as soon as you put the tools on them that let them do their job then we're right back where we started or worse of in some cases.Things we always got free, now cost points. Thorax swarms for tyrannofex, stinger salvo, etc. Yes, we got point reductions, but now all our options that used to be free cost a crap ton.