For item diversity: Change trifoce?
I hate it that on champions triforce is good on, it is so good that it is always an early build, doing anything else just does not make sense.
How about we change spellblade proc to ~150% base AD? Then there might be some other options that make sense situationally (and yes, I play champions that triforce is core on a lot, I'm good with them taking a hit in effectiveness, especially heca/vi, as long as it makes build path a little more interesting).
If there is a concern that it will push triforce out for those on whom it is marginally good, then increase some other stat (give it a little extra damge or HP), to compensate those champions -- the compensation will matter less for its core abusers (like heca), who process spellblade very often, so it should balance it a bit better amoung situational and best-case users.