I finally got around to play this map online

. You really had a few nice ideas there but there are also several bad things.
I like how you changed the entrances to both maps, a kind of u-turn before you get to the real entrace. Thats a really nice change, also how its not possible to get back into the bases from the room below with the new teleporter.
But the bases themselfs are just too freaking small. You feel like the walls will crush you compared to the original. And there are lots more columns now. When fighting in the bases you have to fight more with the columns and not killing yourself then you have to fight with the enemy defenders

. Also the nexrooms are hardly usable now. Trying to shoot out of that smal narrow window is a PITA and i really like how you could get out of the rooms in the 'original' map when you jumped and crouched. In your version this room hardly serves to get the nexgun and shooting out (and getting out) of there is much harder or impossible.
So my ideas would including making the bases bigger! I'd also make the room below the base bigger.. The nexrooms.. hmm i can live with them being harder to shoot out (though i really dislike it) but the fact that its impossible to get out in the front is bad. Maybe a teleporter if you want to keep the windows small?
Also its true that (at least with picmip) this map looks very boring compared to hydronex.. Not sure what to do about it, maybe add some sort of posters on the walls?
And about the exit teleporters from the 'armor room' below the bases.. maybe it would fit this map version if they would spawn right on the exit of the map and launch you towards the hagar and mortar (so that you do not have as much speed you can use to get out of the base?