I suggest the STF time limit be lowered to 3 days based on the already existing negatives. The STF only starts with 10k and has to deal with upkeep the entire time. This means the person still has to play a few hours before they have a decent weapon and armor. It can take a casual players entire day to get the set up they actually want. They already can't use the market and thus can't be exploited to bring in extra anything.
The Pros:
You can test out builds and experiment more than once a week.
Weekend warriors can use a different build every weekend without perfect planning.
Speeds up the metagame through increased theory testing against the masses.
Cons:
Cookie cutters twice a week.
High level peasants. (Some people would enjoy this
)
Troll builds may become more common, but they still have to put a few hours into it unless they go naked thrower, which is entirely possible right now. Many would get bored before they reach max trollish potential.
Even 5 days would be better without changing much in the way of cookie cutters.