Now, for main post for today, review on Fairy tail 2014 and 2018.

From what I remember from the manga, the story is adapted accurately, and there's not much difference between the two. If you liked/hated the manga volumes that cover this part of the story, don't expect much difference... but....

Oh boy... here it comes... Somewhere around the middle of Fairy Tail 2014 is filler hell. Some are adapted from omakes, some are 1-2 episode stories that are cute and ok... and then there's the absolutely worst filler in all the anime I've watched. Naruto filler is A+ compared to it. This one is completely nonsensical. I can't explain much more about it, because I still didn't understand what exactly happened in the story and why.

As for Fairy Tail 2018, the main faults are those it inherits from the manga. It had at least half a dozen opportunities to have a satisfying and meaningful death for important characters. Fairy Tail 2018 backtracks on EVERY SINGLE ONE. Also, Grey attempts suicide via Iced Shield for the 100th time, and Natsu stops him again, for the 100th time, giving him the usual speech about living or something.
Fairy Tail 2018 has the most over the top conflict of the story, that was build up for years, and the consequences are just that a very old and frail man is now in a wheelchair (even though we were given the "he's dead" scare).
As for how over the top the conflict is, think 2x Naruto's Kaguya, except these guys really were build up, from way back during the original run of the anime.

Fairy Tail 2014: without the filler, 8/10. With the filler, at best 7/10.

Fairy Tail 2018: 7/10

Verdict: it's ok if you're already invested in the series, but if you aren't, getting past that filler is gonna be a struggle.

@alyx i've been meaning to watch that. can you check quickly which episode the filler starts on? I would just skip those ones