I think the gap between standard and premium coaches is getting smaller, most new ones are delivered with a toilet and PSVAR.
However, Plaxton/Volvo did tend to get smaller customers who maybe order 1 or 2 coaches every few years rather than large orders. I suspect Yutong is chipping away at operators with less money, Volvo's 9700/9900 eating into operators with a strictly Volvo fleet and many choosing used vehicles.
If you've ever been on a Tourismo Access (I'm thinking specifically the Aircoach examples in Dublin) then you can definitely see the gap between 'standard' and 'premium' getting smaller!
Yutong are certainly making hay in the coach sector at the moment, particularly with Flixbus operators now that the 9700/9900 are dead. I suspect McGill's knew that the game was up for 9700 - they certainly knew the lead times had become immeasurable. I read an article about Hollinshead Coaches taking a new GT12 noting that their "loyalty to another manufacturer would likely have continued [read Volvo, given their fleet] if there was availability".
Some of Plaxton's competitors are getting long in the tooth now too. The Scania Higer Touring, which seems to be having a bit of a renaissance, and the VDL Futura are in desperate need for some sort of facelift.
Given National Express have walked away from the Altano and are looking for an alternative high capacity vehicle, with
discussions in play with other manufacturers, could the Elite-i make a come back?