Yeah, I think Pie can be fun when the game is balanced.
The teams should be hand picked evenly instead of just saying N v S or whatever. FFA is generally a short game because the stronger players overpower the weaker ones easily.
One possible solution would be to recreate the pie DLL with some restrictions, for example a lot less ore. Perhaps disable some weapons like ESG. (It's too easy to sit in your base and make ESG)
Or perhaps code something that lowers your unit population limit.
Pie is one of those maps that people like to play over and over (sorta like pop music
*puke*) but it can be fun once in a while.
There's probably other modifications that could be done to make pie more fun.