the fact that they don't get more of them as they expand, and that as they expand, the construction ships have no sense of travel time and keep trekking back and forth across their territory
The first request is a fairly small balance change (and arguably not a good one, since it may be to keep the crisis from snowballing too hard) and the second sounds like a bug to me at most. Neither of those issues requires a rework to fix. The critical thing is them freezing up.
Reworks are expensive, which means they require a lot to justify the time dedicated to them. A big crisis rework means fewer new features, less time spent improving performance, less improvements to the the regular empire AI, or less improvements to other existing systems.
People are way too quick to jump to full reworks of systems. Right now, I'd much rather see them focus on stabilizing and perfecting what they have, rather than making large changes. Nothing in the game has the fundamental issues that the old FTL/expansion system or the tile system had.