Been playing against a really good Lambda, so here's some of what I've found out.
3C goes under 5D and 5C mash. It can also go under 2C, though the timing is kinda iffy. I've gone under it and then gotten hit by it when I tried to 3C again, so I dunno.
IB those parsers, or jab them out of its startup. Makoto's A jabs are really, really good for punish and pressure up close.
Bait wakeup gravity wells and punish. Lambda's GW is her best tool to get out of Makoto's close range pressure. If you make her waste the DP, then you can score another free combo and knockdown to put even more pressure up.
Be patient and IB 5C, 6C, swords, whatever you can to get frame advantage and meter. Far away she's got the advantage, but up close (and in the corner, optimally) Lambda should be very scared of Makoto.