1&2 could be taken care of by traditional preloading thereby rendering point 3 null. point 4 being you wouldnt play with it...well then dont
As for the btw I havent yet seen an engine that gives out more oil pressure due to the TPS ...more like it is in relation to the speed the oil pump spins at :shrug: Thats if I interpreted the WOT as "Wide Open Throttle"