I main support, and so far this season has been incredible for supports. We've a a slew of new items, new amazing masteries and a ton of QOL changes, and Im here to suggest one more.
Sightstone is a great item. For 700 gold we get an item that gives us a constant supply of wards all game long. We only need to place a measily 6 wards to make our money back from it, something we do after 9 minutes most of the time. Even the ruby sighstone is so gold efficient that we can basically upgrade it straight away for no loss. My problem is, for an inventory slot it just doesnt give us enough wards.
3 wards from the ruby is great and all, but 3 wards is never sufficient for map coverage. That dragon, baron and one other spot. Really insufficient late game. We will always have to be buying 1-3 extra wards to get the coverage we need, devoting two inventory slots to wards. So with boots, sighstone, a gp10, and wards (the bare essentials for a support), we have 4 slots filled. Now, adding aegis and thats 5 slots, one left for a single component on our next item. And thats not including pink wards, or an oracles that we know we cant use right away. So if it has multiple excellent components then we can only fit one of them, and any additional gold we had at the time might aswell not be there on that trip back to base. Its awkward and is really getting on my nerves in an otherwise fun season.
My suggestion is simple: Give use another upgrade to sightstone that gives us 5 wards. Make it only cost effective mid-to-late-game to prevent ward saturation bot lane. Something like build from a giants, or one of the other small support items like mana manipulator, or even from a gp10, like kages or philo. Im sure you could find some way to make it work. Its really just a QOL change that i think I and a lot of other supports would be very grateful for.
PS: thresh is awesome and really cool to play, little awkward with his E, but practice irons that out.