While a skilled BA can be difficult to fight against, an attack by a group of them - and I'm seeing this more frequently, as the number of people who prefer to play solely as BA - is pretty much impossible to deal with.
This statement bothers me because it is inherent in the community that there is still people that think a single mech should be able to hold its own against 2-4 BA's. This isn't true by any means. If say four BA attack you, it is the equivelent of a 4v1. You will and rightfully so should be destroyed.
One on one, BA have trouble against mechs right now. This is normal. This is fine. Two BA vs one Mech should result in the mech being in serious trouble. He's fighting two PLAYERS. It would be like fighting two Mechs. Any more then two is ridiculous to even argue about. I don't know of any situation where one asset should have an easy time against any 2 other assets (Mech vs 2 ASF, ASF vs 2 mechs), so why should BA be any different?
Fortunately if the mech pilot is good enough, he can destroy both. But he should still be in danger and this is a matter of skill, not balance.
Now if you want to say 4 BA vs 4 Mechs. Then we can start talking about how dangerous BA actually are. But in that scenario they are not. Unless there is a skill gap. Those BA really have to pull something out of their ass to succeed. Sometimes they do, most times I've seen they haven't.