Lack of vision this preseason is disturbing

The map this preseason has gone as dark as a bronze V game. All I've learned the longer I play this game is the importance of vision and playing around it. Now there are very little wards up on the map.

There are 3 reasons for this:

Cant buy green wards Yellow trinkets severely underpowered Sighstone only way to get legit good stealth wards

I know this is "intended", but the effect on the game is negative. Your trinket recharges waaaay too slow to ever get 3 stealth wards up on the map at one time. The old yellow trinket was like a mini sighstone. Not quite as good but it was possible to light up the map if you used it when charges came up. Now it's just a shitty trinket ward that eventually levels up into a stealth ward.

The play around lack of vision is depressing. Barons are being taken ez pz by both teams because of lack of vision and roaming is waaaay too strong. As you know you will not be spotted until last possible moment if at all.

Pink wards are not a replacement. You can only have one and often times it is spotted pretty quick when ur laner notifies jungler a rough idea of where you warded. Raptor buff clearing one of the only two wards you may have at one time is even worse. Never mind sweeper and pinks. There are never any wards up on the map even when I am paired with diamond and master tier players.

The game is not as fun because there is no play around vision. Before if I got caught out I'd feel like it was my fault for not warding. Now I don't feel that way. Please either bring back green wards, revert yellow trinket to what it was, or both. It's to the point I want to buy sightstone on a owner despite the fact it's an awful buy