Hi BattleStar. I'm not too good with OU rates, but I can help you with your RU rate.
You found the big weakness to Nidoqueen which was great, and Timid Nidoqueen would have fixed that problem. However, Timid Nidoqueen isn't that good at wallbreaking and misses out on some pretty key KO's iirc. Running max speed on Feraligatr would have solved the issue much more easily, as it still performs its job which is sweeping, and the added bulk isn't all that relevant for gatr, as it is already decently bulky. You could also have pointed out what was wrong with the rotom set, as thunder wave is used on an expert belt set not Choice Scarf, and locking yourself into Thunder Wave is not a great idea and doesn't help rotom with it's normal counters, such as Ferroseed. You could have expanded on why Entei could fit his team better as well.
Although I'm not too solid on OU, I'm going to try and help with your OU rates. On the first rate, Aerial Ace over Pursuit wasn't a great idea IMO, as Bullet Punch dents Breloom a fair bit anyway. Anything other than Scarf Breloom is dealt with fairly easily by Latias and Tornadus-T, and Scarf loom is fairly uncommon(only 1% of breloom are Choice Scarf). You could have said that running Sleep Talk on Tornadus-t would help with breloom though, as then it can absorb the spore and hit it hard with Hurricane or switch out with U-turn, and it gives him a nice sleep absorber. As for Pursuit on Scizor, Pursuit helps him to get rid of the vast majority of Keldeo's counters, such as Celebi and Latias.
I have no idea about OU hail, so I'll leave that to the OU raters. But keep on rating BattleStar. You seem to be able to find the weaknesses within a team, it's just finding ways to fix it, but I'm sure you'll improve with practise.