Funny you should mention the Cicada... I've been playing around with making the starting lance for the campaign one each of the lights that I consider strictly inferior to other mechs in the game. (And no extra mechs in the bay.) So a Commando, Locust, Panther and UrbanMech (along with modding the speeds back to 30 meters per TT move, no fudging... so I often find myself picturing the UrbanMech pilot begging the rest of the lance to "Wait up, guys!").
Today it occurred to me that career mode is supposed to be tougher and that there were two variants of the Locust and one of the Commando that I hadn't used. But that leaves one slot open, and what horrible travesty of a mech can I put there that I haven't used already??? Oh, wait! The Cicada is perfect!
I did end up going with the 3C, since I'm not quite insane enough for the 2A.
Edit: Oh, and I thought about the all-Locust option, but part of the point for me is to create a situation where I have to find a use for some of the mechs I otherwise would throw in storage or sell without a moments thought... so the variety is a big deal.