I'm shelving Metroid Prime Remastered for the time being, but I was very close to abandoning the game altogether...

Rating this game is hard, there are times where I felt like it was ever so close to a masterpiece - most of my time in the Phendrana Drifts, but especially getting the thermal visor at the bottom of the Research Core or the whole Sunken Frigate, those were wholly atmospheric moments that had me in awe throughout - however it has frustating moments and lows that make me want to drop the game and barely rate it as passable - Magmoor Caverns are not great and Phazon Mines are even worse imo.
Platforming is mostly a miss throughout, especially when it is integral to fights. Grappling was even worse, you'd have to be positioned just perfectly - and even then you could miss and end up stuck or fall into lava (yet again), I hated it...
My biggest gripe though would be backtracking - I've only ever played and finished Fusion before this one, but it didn't feel nearly as necessary to always go back and forth between sections, like it does in Prime - it is such a waste of time imo and I wish they would have added some QoL features related to this.

On the positive side, the OST is stellar, as is the overall atmosphere, you really feel like you're alone on an unforgiving planet.

We'll see if I come back to this one with a new perspective a few months down the line.
EDIT: A month after the facts, this is turning into an abandoned game, without any regrets. I either haven't found "my" metroid(vania) yet or this is simply not a genre for me - oh, well.