Where do you think that this game would benifit from speech?
1) Messages from other craft (like the announcement that they'll scan your cargo hold) sometimes go unnoticed. They wouldn't if there was someone speaking to you.
2) Mission instructions also go unnoticed. I've played quite a while by now, and only recently I noticed that when you undock, a bunch of messages tell you what to do.
3) Don't you think there should be a computer voice? I miss computer voices talking to you. Kind of like that WC movie, which wasn't that good but had that computer AI, what was it called?, "Merlin", I think (the computer, not the movie - I won't try to remember the movie's name as it would be futile). It's a very nice futuristic quality.
4) Believe it or not, speech can also help to time the messages right, so that they don't come in too fast or too slow. If you have someone speaking, you can't make a mistake there.
5) Ah, speech also makes you feel surrounded by people, and not alone in the universe.
One question, though: are specular maps implemented? And if so, at which level? (do they need PPL?) I did already some work and I can't see the specular maps. I use a TNT2 without PPL, but I konw specular maps can be accomplished without PPL (If you want, I can try to code the technique myself, it's not hard, but first I would like a confirmation about whether it's done or not). It's quite important since the planet I just did has a lot of water on it (one side of it is only water), and without specular maps it doesn't look that good. (I still have to add the clouds, however).
Also: Gas giants? Do I have the same version? In the version I have, the better ones (although they do need work) are the gas giants. If there's one that needs work is toxic_disaster. Man, that one looks wrong.