I'm hoping that we are winning the battle against poa trivialis, but I'm scared to start thinking that, as poa trivialis seems to have a way to sneak up on lawn owners. I haven't yet identified any of it in the renovated area, however, I don't know if it's just me, or a seasonal thing, but I have a difficult time positively identifying poa trivialis until it gets to be a saucer-sized patch. During early spring, it is difficult for me to distinguish from the rest of my lawn. By late spring, the lighter color gives it away, but by then, the patches can be pretty big. I do know that now, when I identify a patch of poa trivialis, I'm going to try to never wait until later to deal with it -- every day it is allowed to continue growing is a bad day for the good grass!
A few of the renovated areas which had water puddling in them due to build-up of blue-green algae preventing water percolating into the soil and then ended up sparsely populated with KBG have had poa annua spring up in them, but that is readily identifiable right now due to seedheads, so I've been pulling that manually to try to keep ahead of it. Hopefully poa annua is the worst of the problems this year.
However, I'm anticipating that some poa trivialis will spring up again eventually. We're going to remain vigilant and be proactive to kill, cut out, and replace any poa trivialis as soon as we identify any!
I'll try to get some more current photos up, but playing catch-up in too many areas of life right now...