Few things to consider:
WBF is made from all world bridge players(WBP).
Do WBP accept WBF as it is?
If YES, then OK.
If NO, what are WBP going to do?
A) Take over the WBF with players like Boye (President)
and other players who love the game.
After 2C-2D-2S with fit responder estimates working cards/tricks:
4S 0-0,5 trick
3S 1 trick
3NT 1,5 trick+ (serious NT)
No fit: Start with 2NT or biddable suit
Here you have ace and a queen and dobbelton so potential 1,5+ tricks so 3NT it is. The problem ...
If you bid 4S you will do the same thing the champion does at the other table, so start with double and try to figure out if slam or not.
The downside is that they will have one extra round to explore whats best for them over 4 spades next.
Lets say you start with ace of clubs and dummy hits with:
Partner plays 2, and declarer Q.
We play udca, what next? Try for ruff or does partner have the ace of spade? Would he play the jack from J2?
21 hcp with an ace missing at the beginning can not be the hand since he knows partner has only 8-9 so would just bid 3NT. He must have missorted, at least he has minors, with 5-5 (at least), so I think 6C makes.
When the best bidder in the world, Joshua Donn, bids 3H that must be defined as normal :-)
The story didn't end well for the 3H bidder (me) when it went pass pass pass and not making when partner had KJxx - K9xxx AG9x but at the other table: 2H-X-P-2NT-3D-P-5D-P-P-X-XX just ...