Speaking to Viaplay, double try scorer McDowall said: "We talked about it at half-time, how we missed some opportunities, though, so when we got to Treviso in a couple of weeks, we'll need to tighten up. That's the good thing about what we're doing here - we're never satisfied with what we've done.
"We scored some good tries here and we will take the win, but lots to improve on. We're building a great culture here, two boys coming in and getting their debuts and Jamie Bhatti on his 100th appearance as well, so we had a mix of old boys and young boys who did a good job."
A couple of seasons ago McDowall looked set to leave Scotstoun, but the big centre has grabbed his opportunities with both hands to become a mainstay in the Glasgow squad and pushed himself into the Scotland mix.
"It's been great for me," he added. "I'm really loving being part of this squad and what Franco Smith and all of the other coaches are doing here. It's a great place to be at the moment."