Why do 3 or 4 others deserve to lose 30-40 minutes of their time with you trying something? The reasons why these things dont work, gets highlighted in each and every thread like this. You'll fall off late game. Supports bring other things you wont have late game.
People like this are the epitome of sheep. All they do is follow the paths of those brave enough to blaze new trails. I have been playing since before there even was a season one. I have seen the all AD teams replaced by the all AP AoE teams, replaced by the 5 man Tank Teams, replaced by the current meta.
I have seen countless champions move from one role to another and go from worst champ ever to flavor of the month and back again. People who try new things find new ways to play successfully.
I am not saying "Support Ashe" is anything special. I agree in way with you that its not a true support in the traditional sense of the word. Fact is that all support style champs who give up cs to another more specialized AD champ fall off late game. its only their skills that keep them relveant. Ashes perma slow and AoE stun are not to be taken lightly at any stage of the game. She can rack up a huge early assist count that translates into aura items to further help her team win late. Its not complete trash, and i cant see if played well how it wastes anyone's time... especially in normal's where experimentation should be encouraged. If you want to play seriously competitive games and only want the current meta then play ranked. That's where it belongs.
Will all experiments work out...no. Will some cap earlier than others in ranked game play...yes. But either way playing something new and different can be mentally challenging and fun and rewarding if it works. Don't discourage creativity and pretend your above what you are...a follower. You will follow the current fotm until the next one comes out.
TLDR: BK is a sheep, I tried this out today in normals myself...it worked about as well as Vlad did my first time, but there is potential to be had. Mid to late game i was able to keep my carries engaged with fleeing champs vias the stun/slows and allowed them to rack up multiple kills. I also saved several of them that got out of position with similar CC success. There is no denying Ashe has the potential to feed a friend heavily if played properly. Some hybrid of this idea might be an ideal way to play her since she doesn't really scale as well off of AD as most other mainstream ADC's, but her CC is **** for feeding them. call it a kill lane, low creep/poke build, or whatever you like...i will experiment some more and let you know what i find.
PS: if you want to add me so you can duo que this with someone who gets this, look me up. I'll roll with ya.