First, I don't like space maps....but soylent is tolerable because it is designed well.
I can't say that I have this map figured out 100%, but I've watched enough duels on it to see basically how people control it. I don't play it enough mainly because I hate dying from falling off an edge
That said, I think the weapons and armor/health are spread out enough that you do have a chance to get back control if you know what to do. Most of the time, players seem to control it from the upper position where the armor/crylink are located. From there, you can get MA/MH/NEX and you can track the opponent and shoot down at them from 4 pathways. Players that know the map well can usually control the map by keep the opponent away from the nex, mortar or megahealth. They can, however, grab the MA and RL and use that to dig themselves out of the hole. If the player on the top level has a mortar/nex combo, then that can be tricky because they can spam you, detonate your rockets and also tag you with the nex if you hang out in the open too long.
Like many others, I appreciate the ramp jumps on this map. I think the ramp jumps play a major role in allowing someone to attack someone on the top level without making noise.
As far as improving this map...hmmm, I'd have to hard time thinking of how that could happen. Maybe replace the hagar with an electro? That would be interesting. Or you could place an electro on the ledge above the RL area (so you see it as you descend the main stairs).