End-game warding

This is not a suggestion, more of a question, as I'm sure many have asked for it already but it isn't here:

At the end-game when everyone has a full build, why doesn't an additional space open in the inventory for control wards? Or why cant you replace your trinket with a new unlocked-with-full-build trinket that lets you place control wards? I feel this could be an easy adjustment, once the inventory is filled with only completed items (not including or consumables, or any other items like the dirk you know what I mean) either unlock a new control ward trinket, or open an extra spot for 'em. I know games tend not to last that long anyway, but it would be nice to spend my stacking gold on something, rather than watching it climb to 10k lol.

Anywho, is that OP or something? Also, bring back stealth wards dangit :/