Why not just make T3 runes 1 IP too, seeing as the system's getting scrapped anyway?
If the entire system is being scrapped in a few months anyway, why not just make all the runes 1 IP each in the meantime?
Doesn't really hurt much at this point, and is a head start on "leveling the playing field for newer players".
It shouldn't interfere with any tracking for potential reimbursement, either, since AFAIK your account history tracks purchases by currency spent.