Thanks a bunch for giving us the option to give you some feedback.

I really like the fixes you have laid out.  The only thing that worries me is the arbiter nerf.  Yes he is very hard to stop when playing as covenant, but is almost too easy to stop when playing as UNSC.  I think making him easier to target would be better than nerfing him.  It does suck that you have to have a full army of jackals to stop a fully upgraded arbiter, so that should be addressed; but nerfing him overall would make him useless against UNSC.  Just please be very careful when deciding how to fix this.

I agree with making the gremlins tier 2 units.  It would make anders a little weaker, so maybe just making the unit tier 1 with no stun upgrade until tier 2. 

Everything else sounds great, especially my dear grunt needler upgrade.  It would be nice to not be limited to vamps only for anti air.

One other buff that is needed... WRAITHS!  Please do something about these poor guys.  They try so hard.  Even when they are fully upgraded, they cannot defeat a less amount of canister tanks.