I would select players who can hold the ball.
I'm not just talking about this morning - I'm talking about all Popa's matches (or nearly all). Yes, his defensive system has been outstanding but we never have any outlets. In the last two games we were constantly clearing the ball anywhere (or missing passes under pressure) so wave after wave kept coming back at us.
O'Neill, Metcalfe, Miller, Geria, Behich, Yazbek, Boyle... none of them could hold possession and their passing was diabolical. I don't blame the strikers so much as they had no support (although Toure did set up Tilio with a lovely ball - if only he'd been more ready for it...). Duke's ball to Metcalfe also was a peach.
I'm aware of the Robertson/Triantis issues and desperately hope they are resolved, especially now qualification is done. But I also want to see Balard, Nisbet, Arzani, Irankunda get a go. Even Okon E is an infinitely better ball retainer than the lot I've mentioned (albeit at a lower level). If he can get 1st team football somewhere I'd say he's a strong chance of a call-up.