Question A) So why can't they succede on screen, again? If anything, it serves as an anti-hype. I don't particulary see how seeing how Burgess fails time and time again causes anybody's imagination to go "This guy is awesome villain, can't wait for the final arc when he will finally be awesome.", to be honest.
Do they need major on-panel feats to draw from right now?
When we get deeper into The New World it's gonna be all about The Blackbeard Pirates and it's all gonna be on-panel.
There's also the fact that Burgess has been getting showcased into situations where either A) a character has been reserved to be defeated by another or B) a character is a major antagonist and needs to look strong.
B) Your Doflamingo example is unsubstantial. Because yes, indeed, we have seen Doflamingo do some cool things. It was a great setup, even if it didn't quite get the pay-off just yet. HOWEVER, that is not the case with Burgess. Doffy defeated several foes, clashed evenly with several high profile people, and did stuff. Burgess mostly just stands there and takes a beating or is entirely ineffective at offense. We have seen him: Fail to attack Ace, get curbstomp by Magellan and NOT get instantly defeated by Sabo. The champion of Blackbeard Pirates.
Fail to attack a logia who at that point in the series were essentially invincible unless you were Blackbeard?
Get beaten by a guy like Magellan who was the major antagonist of that arc, was still to be involved in it's resolution and destroyed pretty much everybody he came into contact with?
Stand toe to toe with a guy who made a major redebut in this arc, in which he clashed with an admiral and eviscerated a senior vice admiral?
These are not things that destroy credibility!
Not unless you remove all the context and judge things purely by wins and losses, but that's just ridiculous!
get crushed by Sengoku
This one deserves a quote of it's own.
Get smacked by the top guy in the marines, in his battle debut…when you're never done saying how the marines always look weak and can never do anything right?
Bloody hell, Darth, you cannot be serious with this one.
And my question is, if he is supposed to only get hype from things he didn't do on screen, and he isn't suppose to show his stuff up until the very last final arc, why include him? Pointless fanservice while ruining his credibility further?
I assume Oda is going to let us see a bit more of the Blackbeard Pirates on a gradual scale as the SH's move through The New World.
Y'know, let us get to know them a bit more on an individual basis and build the rivalry between the two crews.
Or else we'd end up with a final battle between two crews where one captain dislikes the other, the other captain doesn't particularly dislike the first captain, and the rest of the crews don't really give that much of a shit about each other.