Beo's weakness IS his neutral, so I guess it's understandable that it would seem difficult to deal with when he has a good assist to help him. Dekillsage makes it seem like it's cheating, but it's not really.
What kind of characters do you play? If it's something like solo Big Band then you are going to hate life as dealing with Robo's assist and a hit grab is really difficult. If it's someone like parasoul, then you could do a crouching move and then napalm pillar to counter mixups during beam. Bella can do deflector using this method I think. For characters like Valentine and Painwheel, then it's really a matter of hanging around in the air, tapping the assist for a longer cooldown, and then going in for your stuff. There's also the option of running brass or laser youself.
To prove you wrong, I give you my team
Fukua(H drill), Ms.Fortune(H fiber), Robo Fortune(H laser). I would just jump over the laser, call my own, and to keep me from doing other wise, I would use fireballs. I also have the benefit of drill and laser assist, allowing me convert off of drill and not having to wait for the startup of fiber. I can alpha counter if he tries to lock me down using assists and etc...