It's not that they can't be fixed, it's that I personally can't be assed to fix them because I don't give a toss about TSL (not because of bugs - I just don't like it period). K2CP is @JCarter426's baby, and he was AWOL for the last 12 months or so, hence why it hasn't been updated recently.
Edit: To clarify, TSL is fundamentally broken narratively, and that indeed can never be fixed. TSLRCM scratches around at the edges of it, but you can never make TSL complete solely through mods. But that is not the purpose of K2CP, so it's not particularly pertinent to this discussion.