There have been a couple more levels input in the middle. For reference a ruined city might have 200-300 installations while an intact city might have 1500+ installations. Obviously the larger the ruin the more you can find, but also the longer it generaly takes to figure out the language. If you ever come across another ruin from the same empire then you will not need to work out the language and it will only take the xeno team a few days to figure this out and let your engineers get to work.
The tech level is an indication of the systems you might recover from storage. Using weapons systems the capaciter level will equal the tech level listed. TL 5 will get you ecm/eccm 3 and TL 3 would get ecm/eccm 1 ect.
Brian