Two things to comment on. First about the space: - first of all 250 points for stellar is a high level of miniature. You will need to pass 25k, 30k, 35k and 40k of hyperadvanced techs. Usually games do not last that long since there are weapons, which could be used before to resolve the stalemate situation, if any. Besides stellar could be used earlier on higher hulls like Titan and Doomstar, which is substantial addition to overall firepower. Another thing with placing stellar on battleships is that it limits number of other specials you could put on the same ship due to lack of space. In result you get poorly defended BBs, which can be easily blown by faster ships.If I can fit a 200 size Stasis field on a cruiser then I can easily fit a 250 stellar on a battleship (two in fact if I strip most of the specials)... It may be the 4000 damage it now does that caused me to mention it. Damage to cost and sizes ratio are high.
Second point about the damage/space ratio:
a) Stellar has a little shortcoming - it does enveloping damage, consequently you will have to do 2 shots vs class 26 shielded BBs with multiphased shields.
b) many other weapons have same or almost same damage/space ratio and can be used earlier than you get such a high miniaturization for stellar. For example: spatial compressors, disruptor cannon, particle beam, plasma torps, not speaking of other special weapons like assault shuttles or emg rockets, which have utmost ratio, if they can strike (in case of assualt shuttles - overwhelming ground combat advantage).
So stellar is by no means the best weapons in the game. With this regard many players consider spatial compressors to be the best since it completely ignores any defense specials.
I am working to improve VDC further, including singleplayer, so any bug discoveries or finding/reporting shortcomings of the game or things that you'd like to see is very useful.PS Is there any particular feedback that you would find useful?