I hate shipping wars, but come on, seriously… VegeBul literally got fuck-all in DBZ, while GoChi got every moment, everywhere, every time (e.g. when Goku wakes up, after the illness, that kiss before Cell and the post-Buu reunion hug)!! So much potential VegeBul development was skipped over, in favor of GoChi and also GoDel (anyone who knows DBZ, can see that, clear as day). Is it so horrible now that they finally got something in DBS, after two freaking decades? As one of the commentators pointed out, they were in Capsule Corporation anyway, so of course Bulma’s more likely to be there than Chi-Chi. That being said, I love all the pairings (VegeBul, GoChi and GoDel).
As far as Vegeta exploding the fused Zamasus, it’s called rage power. He saw his son about to die… It isn’t the first time someone near death has been able to summon vast resources of vestigial strength, as a result of their fury. That happens quite often in Dragon Ball (e.g. one-armed Gohan destroying Cell, Goku beating Piccolo with a hole in his chest).
Let’s also keep in mind that Goku, Gohan and Trunks have achieved comprehensive victories against main antagonists. Vegeta has NEVER had that same privilege, so of course he deserves every single bit of that shine, if not more (especially considering how badly he got screwed over in ROF, after all the anticipation and Toriyama’s “intentions” to make him the hero).
I’m no Vegeta-fanatic and I understand that Goku’s the main hero, but that doesn’t mean that the anime hasn’t repeatedly fucked over Vegeta, because it has (like in DBZ, where filler bullshit is added in just to mar his character, e.g. Vegeta running away from second-form Frieza like a total bitch - OOC and never happened in the manga; far worse in DBS, where he simpers and gets on all fours before Beerus, again excessively OOC and not in the manga).
IMO The manga>>>>>anime. Better characterisation, greater consistency and more in line with canon.
And of course Vegeta fans can complain if their fav’ character has become the goddamn joke of the show (bowing, simpering and repeatedly being an overall pussy, before Beerus, which is so not himself). When does Goku ever act like a bitch, before Beerus? Yeah, that’s right never. Quite the contrary, he stands up for himself when Beerus threatens him, which is what the real, properly written Vegeta would also do.