If you're coming straight from Nu to lambda you'll feel restricted, definitely.
But it's the whole point y'know, lambda is supposed to be a more restricted version of Nu. She takes a bit to get used too. Hell, probably more than a bit. However, limited in just movement and mixup wise compared to Nu from what I feel. She still have great zoning tools, okay pokes, good AA and a decent reversal.
On the whole, don't random 236C unless you think that they're going to jump back, or if they jump far away. Like I've said, start up is too slow. Used more for combos. Or use them after 5DD or 6DD once in awhile. Gimmicky but if you've been cancelling them into 214D or whatever they won't be expecting it.
If you want to parcer use 236B. Decently fast and it hits low, which is not what alot of people expect at that distance, plus you're still fairly safe.
Just don't use 236D all that much unless you use it during her sword spam DD or against tager.
She's still a goddess of zoning though, and that's mostly how i play.