Walls of text;
blue means chain text,
red means verdict.
I'm not so sure about Pyroar, it is very reliant on Choice items, in the same way Sawk is and therefore pretty easy to play around, not to mention super vulnerable to priority. Its coverage is also lacking and I've found it pretty underwhelming overall.
Pyroar is not at all reliant on Choice items; in fact that is the biggest reason it is above Typhlosion, who practically needs Choice items to even function properly. Pyroar is
far less concerned about its health unlike Typh, and can even make use of it with Endeavor. It has
dual STABs, meaning it doesn't need to use weak coverage moves most of the time if one of its STABs is resisted, since it can simply use the other STAB and continue dishing out good damage (again, unlike Typhlosion). The only mons that resist both of Pyroar's STABs can easily be covered by the
1 or 2 free moveslots Pyroar still has, usually in the form of Hidden Power Grass or even Will-o-Wisp (an incredibly useful tool against Sucker Punches). Pyroar is also
very fast, and powerful enough to be
able to enforce a speed tier. Oh, and
Hyper Voice bypasses Subs, which is cool as hell. That said, Pyroar is already A-, which is above Typhlosion as it is. As a mon itself, I think its
hazard weakness and general weakness to priority hold it back quite a bit, but Pyoar can be pretty flexible in its use and
doesn't feel anywhere near as restrictive to use as other Fire-types in the tier.
I won't object to Pyroar being in A Rank.
Samurott I feel isn't quite ready for A+. It's not that it has gotten any less dangerous, but rather the tier feels it is more prepared for Samurott, even factoring its infamously dangerous unpredictability which made it S last Gen. The tier now has a
greater abundance of faster mons that can revenge Samurott, such as Sceptile, Lilligant, Electivire, Rotom, and even Freeze Dry Cryogonal, while the
power creep makes special Samurott's comparatively sluggish speed that much more notable. Newcomers Ferroseed and Lanturn aren't making things easier. As for
SD Samurott, which can at least bypass its bad speed with Aqua Jet, it
faces heavy competition with Feraligatr, which is statistically superior for a boosting physical set, has more effective coverage for the meta in Ice Punch (hits Plume and Dragalge), and even pulls off a Dragon Dance set which can afford more coverage. Toss in the fact that
most teams that can stop SD Gatr can also stop SD Samurott, and suddenly
Samurott's unpredictability factor isn't as punishing/unforgiving as it was before.
Uxie is one of the best utility mons in the tier, bar none. It is
really bulky and has
good speed to accompany it, which are already signs that Uxie makes a
fantastic supporter. Access to Stealth Rock, Dual Screens, and Memento
lays the red carpet for literally any setup sweeper to get the party started. It can also use its huge bulk to make use of the
Yawn + U-turn combo, which also lets the user get the upper hand tremendously easily while putting the opponent in a very tight spot. It can even
make use of its speed to outspeed things Mesprit cannot, most notably Sawk. The speed and bulk difference that Uxie has over Mesprit is especially relevant when it comes to a Sub + Calm Mind set, where
Uxie's stat distribution makes it undoubtedly the better user, or even
arguably the best SubCM user in the whole tier. It isn't offensively strong, It's a threat whether it be supporting its teammates or going on the offensive, it is
definitely worthy of A Rank.
As far as defensive mons go, Audino seems to almost be a step up from its stalling brethren.
Wish + Regenerator is an obvious match made in heaven, allowing Audino to heal its teammates while almost never worrying about its own health.
Heal Bell is further icing on that cake, since it means Audino is hard to wear down with both damage and status, as well as amping up its supporting capabilties. While Normal typing is usually mediocre from a defensive standpoint (ask Miltank) since it lacks resistances, Audino's
stubbornness to get worn down means that most teams need to target
its sole Fighting weakness if they want to bring Audino down for good, and it
is usually extremely easy to see coming, allowing Audino to act accordingly.
Encore ensures that trying to overcome the offensively inept Audino with boosts won't be a cakewalk. While it is possible to turn Audino into a liability, it is
damn near impossible to stop it from doing its job.
A strong candidate for A-.