That would be at least somewhat sensible.
The following is my own opinion, so mileage may vary.
I'm totally not against Bane getting a boost. Getting a BIG boost. Bane's thing is his physicality (yes, he's brilliant, but let's face it, everything always boils down to a fight with him), and having Bruce be able to beat him up (with effort) really takes away from his use as a Batman antagonist.
But I feel there's a right way for this, a way that'll make sense and
make it stick. <-- Again, my opinion here.
Bane has always come off as making Batman work because he's so...damn...strong and tough. Consider that Bruce is less-strong and less-tough than Bane, and yet basically beats him all the time, now (Bane makes him work, but Bruce wins). It means Bane is somewhere below A-list in skill - he has a couple of advantages over Bruce due to his power, but Bruce wins...because skill. And maybe speed, which partly comes from his training/skill.
So for Bane to go from 'Below A-list' to 'skilled enough to beat the top people' (I'm not talking about David Cain, who doesn't exist in DC any more due to being dead and a completely different character when he was alive, I'm talking Shiva), that's a huge jump, because BRUCE isn't on the same level as Shiva.
Then Bane would just get beaten by Batman again. Which wouldn't make sense, and just have people shrugging and ignoring his win over Shiva (somewhat rightfully). Having him take a win against Shiva then losing again to Bruce (because let's face it, they're not going to just allow Bane to be 'better than the Bat') is somewhat nonsensical, especially since Shiva has flat-out treated Bruce like garbage in NuDC.
But if Bane somehow trains under some luminary, gets good, seeks out Bruce, and conclusively beats him down after a hard fight showcasing how his skill and speed have improved...that might make sense.
And the top fighters shouldn't just be used as stepladders for other fighters to showcase their skill. Shiva is the top fighter in NuDC - if everyone beats her to show they've improved, what does that make her? Look to how this was handled with Connor Hawke, back in the day - Shiva versus Connor Hawke wasn't 'Connor wins, he's awesome!', it was 'Connor LOSES, but he actually manages to make Shiva work, breaks some of her ribs, all done on a day when Shiva one-shots Nightwing while simultaneously cutting arrows out of the air with her other hand. Shiva gives him mad props for all of this. Clearly, he's fantastically good'.
That was more than enough to cement Connor as one of the top fighters without doing what everyone now would refer to as 'Worfing' Shiva.
As a fighter, Bane is below Batman. As a fighter, Batman is below the top fighters. For me, it's just too much to have Bane just jump to where he can take on the top-tiers.
I feel a good way to showcase Bane would have him improve to the point where Bruce absolutely needs to rely on using various bits of equipment to win a fight with him, where in straight-up hand to hand, Bruce loses a majority because Bane is roughly as skilled as him, roughly as fast as him, but stronger and tougher (this would be a big deal).
Then somehow get DC to acknowledge that this is where Bane officially 'sits' on the ladder of fighters, make it his base presentation and consistent rather than a one-off in a mini-series that gets contradicted by everything before and after that mini-series (which would suck, and not leave Bane-fans very happy).
THEN we start talking about how Bane can work his way up further.
I mean, you're right - poor Bane. There's a reason he and Croc are the saddest people on Rumbles. DC really needs to allow some more people who can push Batman beyond his limits, that he CAN'T just count on beat in a hand-to-hand fight who don't have the excuse of 'metahuman'. Bane would be a great character for that, and yet...nope.