A) Since you've got the Borg for it you could use a combination of Mutation/Nanoprobe Resuscitation, basically neutral on draws but with a free play essentially.
B) Depending on your meta (are your opponents likely to play battle) you should be prepared for someone to battle against you. That could mean having safe havens like a homeworld with
Strategema, cloaking devices, being able to win the battle with bigger/better ships, etc. However to win reliably by annihilating the opponent I think you'd need a lot more card investment. So I'd probably not reduce the number of ships but also focus on solving.
C) The advantage to CfR is that you can repair your ship anywhere (only once) rather than at a facility. With Spacedoor, you can download multiple ships and nullify Static Warp Bubble, your deck doesn't have multiple ships to download and SWB isn't very popular, so I guess for this deck I see no real advantage to it over CfR.
D) The Assimilator is pretty slow so range might be a reasonable concern but Treat Plague Ship being worse could be an advantage. If I saw those six missions I'd put my 'worse' space combo under it since it won't get you to 100 with two other missions and I might be confident in being able to prevent AMS point somehow. If you're confident in getting AMS points though or added some other bonus points Treat Plague Ship could be your plan A mission with Intercept Dignitaries as a decoy, maybe substitute Investigate Anachronism for Steal Technology (that doesn't help with RANGE though). Anyway, I feel RANGE is always a valid concern but a mission being worse isn't always a negative.
E) I personally always play with 1 Regenerate or 2 Isomagnetic Disintegrators (so they can endlessly cycle).
F) Well Srategema which is useless in this deck,
Defend Homeworld I mentioned in my last post, report with crews seem popularish atm so
It's Only a Game is alright and Scorched Hand is solid (especially after a STP return to hand).
Tribunal of Q is very common, then you can put the
cards in your deck, use one draw to download Q the Ref and cycle the cards as you draw them so they don't technically clog your deck up while also having access to them as needed.
G) I've played heaps of decks without but Kevin is usually usable every game though maybe not worth risking -5 a lot of the time.
BTW I'm recently back from a STCCG hiatus and not particularly good or super up to date, so hopefully someone better will chime in and correct any nonsense.