Though Thomas was disappointed not to pick up more wins, he was happy with his own contribution - particularly as when facing Quins he was taking on the English Premiership champions and current leaders, and a side who topped both their Heineken Cup and LV= Cup pools.
"I was pleased generally, and happy enough with my performance," said the 22-year-old loosehead prop.
"As a pack we went forward a few times, won a few penalties, and that makes you happy but its swings and roundabouts at times. You win some, you lose some, and that was how it went out there so it was good but we can still get better.
"It's been a massive couple of weeks for people like me, playing against the Dragons and Harlequins, and hopefully I can kick on and get more game time in the Rabo now.
"There are lots of front row players away with Wales at different levels so that means there may be an opportunity but I won't take anything for granted.
"Hopefully I've been able to impress the coaches and if I've done well enough then I may be able to stay involved over the next couple of weeks."
With Ospreys' regular looseheads Ryan Bevington and Nicky Smith on international duty with the senior Welsh and Under-20 squads respectively, there may well be a chance for Thomas when Ospreys return to RaboDirect PRO12 action at Ulster on Friday.
But whether he is selected or not, Thomas, who plays his club rugby for Bridgend Ravens, is keen to continue to develop his game.
"It's been a great experience," he said. "It's a bit of a step-up from what I'm used to with Bridgend.
"Bevs is away with Wales, and the Under-20s are away too, so hopefully I've done enough to get another chance in the PRO12 games that are coming up.
"If not, I will go back to Bridgend, keep working hard, and keep learning."
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