As viable as offline is, this a matter for tourneys, which cost money to get into. I personally had a lot of fun fighting your Valk at casuals, it was good practice, but I think why people want him banned is because this match up
A. Is most likely not in their favor (and it is agreed he is the strongest character in the game, coming in better than Bang, who is agreed to be better than Litchi)
B. Looks like a loss for them that just costs money.
I have an idea. Why don't we just have a shit load of casuals with Valk before MM? And overtime, as we gain experience, we see FOR OURSELVES, and not by advice for fighting him or videos or whatever, if it would be fair to allow him to be used. We can also make the decision at that time.