As far as the AC/20 Raven being a bad plan, not necessarily, it does have it's uses but by no means could it ever be considered a "good plan". With a very limited range and speed it doesn't function great as a scout and certainly not as a sniper, however if you tag along with an assault once he fixes the enemy on him you can easily circle around for some nasty back shots.
It in my experience is horrible for playing solo and nearly anything fast with sreaks will tear you apart but as a close support mech with a decent partner it can be a lot of fun. It seems to play fairly well as a nasty suprise but other than that all around is very weak in almost every other area and your ammo is going to be very limited with no backup weapons or even less ammo if you add in some small lasers.
Overall, fun? Yes, very. Good plan? Not so much but if you're into fun factor, go for it.
Edited by Skythe, 22 January 2013 - 01:22 PM.