I have to say your experiences were positively positive compared with mine.
Halfway through the loading process as I was loading in on the runway, an alarm started sounding - low oxygen apparently. Never had that happen before. It is very loud, and you can’t stop it until the plane is loaded in. (Ironically, later inspection of the right console revealed that the alarm volume was set to ‘Low’.) Might not happen if starting cold and dark, but shouldn’t happen at all.
The rudder and brakes don’t work [well, they didn’t in my first session]. I managed to keep it on the runway long enough to get it into the air using rudder trim, but that didn’t work on landing. Nor did the toebrakes. I did eventually get it to stop just before hitting a line of trees by using the handbrake, but I doubt that’s standard procedure.
EDIT: I thought I’d better check this again, to make sure it wasn’t a problem with my rudder pedals. It wasn’t - but when I checked the Embraer again, they were working with it too. My best guess is that the alarm went off during the first time I loaded the plane at the exact moment I switched to my VR headset. That broke something, and it remained broken through several flight attempts, but was cleared by restarting the sim to check the rudder pedals.
I’m not the best judge of graphics and modelling: It looks OK, but there were some annoying flickering shadow effects in the cockpit. When I lowered the landing gear, the landing gear lever moved liked I’d flicked a lightswitch.
Also, there is a random little cylinder of plastic floating in the air on the right side of the cockpit. Not, shall we say, a token of the highest workmanship.
EDIT: This is indeed present, but only if you’re using the RAF livery. Which is the one I’d want to use 
The Tucano gets slightly unstable and starts to make complainy noises above 200 knots, but for all I know that’s a genuine characteristic of the actual Tucano.
Let me say there are things to like about the Tucano. In particular this early Tucano model offers a superb clear canopy without a canopy bow, especially suitable for the VR flier, whose view is obstructed only by two large mirrors on the glareshield - which it turns out can be folded down. Yay!
That uncluttered canopy - and the Tucano’s status as an RAF trainer, because I once had a pair of them fly past me at roughly my height while I was driving down a motorway running along the side of a valley in the North of England - is why, now that it’s on the Marketplace, I was willing to gamble just shy of sixteen quid to try a plane I thought might well be a dud, since it gained no traction when it was on flightsim.to
EDIT: Having established that the worst problem I found - the lack of rudder and brake control - was a temporary sim bug, and not a permanent feature of the plane, I’m going to say that I’m not as sorry I bought it as I was a few hours ago. It’s not a first-rate plane, but then it’s not a first-rate price. And that canopy is nice.
But that alarm while loading for a hot start needs to be fixed. And it would be nice if in the weights menu the 50% fuel was distributed between both tanks rather than all being in one.
Will we see these things dealt with? That sound you hear (like the alarm on a hot start) is me not holding my breath.