He was bought as an import so you'd like to think he'd improve the squad in his familiar position. If he doesn't, we shouldn't have bought him.
Bridge has been poor, dito Jumpei. Sotirio isn't worth a mention. Ikonomidis was a revelation but right sided. Cejudo right sided too. I'd say that if Raul was given a decent run of games higher up the park on the left he would have been a real asset and Riera would have benefitted.
It's not impossible (with money anything is possible), but I think the footprint of the stadium, and the way it's been designed will preclude any upgrade at anything approaching a reasonable cost. You'd have to take off the roof, you'd have to re-do
If the Govt wanted it to be 35k I got the impression that it could have been designed that way, but they declined to include expansion capacity or making it 35k in the first place and none of the tenders did anything but design a 30,000 seat stadium that cost $300 million.