I haven't looked at the Basi changes for 1.2, but I have a few ideas to throw out there.
Extend range of

grab so it is easier to grab and get ground headshots.
1.

shoots granger spitballs. . .
2.

is always poisonous even without a

3. silent footsteps (i think this is going into 1.2)
4. partial immunity to

shock? Immunity to luci fallout

?
5.

can dive on grenade to save its friend and structures from damage

I also really like the idea that basi doesn't show up good on radar.
Does 1.2 reduce size of bounding box?
6. allow dretch to evolve to basi regardless of proximity to humans

7. Make the gas cloud better. I don't know how you would do this. Make its range bigger, or make it release longer so you could kind of spread it around more. Give regular basi gas-attack. Or make gas linger, so the basi can be long gone, but the humans still get sick. Or allow basi to swipe sooner, so it can attack while still releasing gas. Eliminate light armor immunity to gas?
8. Allow

to devolve into granger, thus gaining an evo

9. Improve

"radar" to be more like the human's radar.
10. Basi Pounce!
Ok, I know none of those are going into trem, but we will probably see a lot more basis after 1.2. since the other classes are getting weaker. Goons are already pretty much just a big target after humans reach s2, so if goon gets any weaker, more people will be staying basi and saving their evos until they can afford something better. Goons will be needing a basi to heal, so they better not pounce on us

I have been playing basi more often but it is frustrating when the humans can often jump out of my grab, when I rarely am able to get away from a basi that has grabbed me. There are a few really good basi players out there, but usually they are just food for the humans. Regular basi can die from half a rifle clip, and adv. basi is little better since it is a much bigger target. For one more evo, you can get a mara that actually has a good chance of surviving to evolve to something bigger. For 0 evos, you can get dretch which it faster, does more damage, and has longer range, and is immune to tk on most servers, it just doesnt make sense to waste your evo on basi. Of course this might change in 1.2 maras can't heal and dretch has reduced range (and can't eat turrets).
Next time: ways to improve granger! Seriously, regular granger needs some kind of attack! Bees come out of its but or something. . .