Slot Efficiency is the biggest problem with new support items.

The lack of passives such as Shield Battery and the removal of the Actives is a terrible trade off for 800G. These items are now incredibly weak and only become worse as the game progresses. You gain a 3m power spike in a chain vest or whatever for the permanent removal of a far more valuable effect. This is a straight nerf to supports in the mid and late game, which only encourages people to sell it and replace it with something that has an actual useful effect. Perhaps the only beneficial effect is the team will be obligated to use control wards now that running sightstone is sub-optimal.