well the sleeves would be the only person nearby and seeing as people like Duo and Treize can team up temporarily it's something. I mean in the game Trowa, and Duo both end up on the 'evil' side against Heero alongside Zechs. 

As for the power of these suits yeah that's to be expected when you're fighting suits like Nu and Double OO Raiser late game.

In this case you could be only there to keep an eye on them and since you can easily lie to them, the sleeves aren't exactly on par with people from some number of years ago and an ancient suit could be whatever to them, Or you could be linked to Stellar. Maybe you found her and they threatened to kill her if you don't comply with what they want. After all extended need medical attention constantly.

Also having another ship, while it worked in the previous roleplay, sort of hampered character interaction and made for some annoying dynamics in game. The Sundown suffices for what is going on now. If you want people you know later on in the roleplay all the more power to you but that'd be rather late game.