I've just finished my playthrough and I'm here to pass on my review.
Firstly, 'New Classes'
What was initially excitement at the thought to try the new classes quickly turned to eager patience as I assumed I would need to beat the game to gain access to them, unfortunately, after beating the game, it would appear that the new classes are still currently inaccessible.
Secondly, Gameplay
What was previously a bit janky, yet effective, seems to have dropped in quality by several times, not only do all of the previously known buggy quest interactions still exist, the new UI has added a whole new layer of confusion due to how non-functional it is.
The movement speed of the characters has been lowered which isn't a big deal, but the entire game has also seemingly been slowed down immensely.
Thirdly, Combat
The combat has seemingly changed, but for the worse.
Instead of adding real energy systems to the enemies, or adding cooldowns to enemy abilities; the combat animations feel like they were slowed down unnecessarily, feeling torturous at times, like I might as well just open actual wow instead. The "cool new ui" doesn't preview abilities when hovering, and you can't even open the options menu in combat.
Those were simply the beginning, the further into the game I got, the more it felt like I had an across-the-board hit chance of 80%, yet the enemies all had a 100% hit rate. Then after that it seemed like the enemy had a 30-40% crit rate, whereas mine felt like it was merely 10-15%.
Enemies still didn't have any energy bars, not a big deal, except for the fact that enemies had zero cooldown on abilities, I can't recall if it was the same in the previous Murloc RPG's, but, because combat animations were much longer than previously, being perma-stunned until I died was likely infinitely more painful.
There were several occasions where enemies would stun me several times in a row, if not killing me, it made it impossible to recover from that fight attempt, then enemies with debuffs like dot's/armor removal would repeatedly spam me with the dot's, sometimes maintaining a permanent 3/4-stack of dots, doing 150-300 a turn, on top of the enemy already doing anywhere from 200-500 damage on-hit.
Enemy healing is atrocious, as the main class is warrior, we have no self heal until maxing prot, even then the heal is costly in its use, and it felt like it did nothing compared to enemy heals, most likely due to enemies scaling in health.
Fights were long, calculative, and punishing, it would take about 2-3 turns just to deal 800-1500 damage, and end game enemies are all at last 1.5x your health bar and onwards. Meaning you firstly need to plan out how to prevent the enemy from burning down your hp first, thus, it was painful watching an enemy with 5000+ hp (vs my 1500-2000) then healing back up from 1600 to 2800, all because my spell-cancel missed, meaning my 5+ minutes of slowly whittling them away was for naught. Forcing me to favor burst damage, yet it left me vulnerable to being stunned and crit to death in the preparation phase.
Fourth, New Content
Honestly, the new content wasn't bad, but because all of the other modifications blasted quality of life through the floor and into hell, the new content felt bad.
Ultimately, if you're as enthusiastic as myself about Murloc RPG, I recommend awaiting further updates, v3.0.5 is not the fun and light-hearted game that Murloc RPG used to be, instead, it is a repetitive and unfair grind, which doesn't give nearly enough of a reward to make up for the suffering it makes you endure. You might as well reopen WoW and suffer in that instead.