Can Clairvoyance be Buffed, Please?

This massively underused summoner spell needs some love Here are some ideas I have

• Decrease Cooldown (45-seconds is the mark in which it may become playable extremely situationally, but would be oppressive)

• Increase Duration (Anything more than 5 seconds would be great, at the mark it is at, I think 6-8 seconds is the range it deserves)

• Increase duration based on level (5 seconds Lv 1, 6 seconds Lv. 6, 7 seconds Lv 11, 8 seconds Lv. 16)

• Reveal Stealthed Units (A global pink ward basically, may be too strong against invisible champs, however you would normally take a different summoner anyways, should reveal stealth wards)

• Have it place a ward that lasts 45-60 seconds (Global WARDS, I like this idea because it promotes warding and makes it so that you have to scrifice a summoner to always have vision, cause vision op)

I understand if Clairvoyance becomes strong then

• Oppressive Vision...

• Removes a combat summoner from a player on the team (most likely the support or mid)

Regardless if you have any other ideas (should it just be reworked) or if you like any of the ides vote and comment below