In my personal opinion, this is Fire Emblem at its peak, wonderful story (thanks to FE3 Book 2), amazing new cast of characters, units are actually good to use and the avatar contrary to what many say, is actually good that doesn't apply to Kris, they take some lines of Jaegen of the original but other than that isn't something as intrusive to the story as Robin, Corrin, Byleth and Alear are due to his sub story being told on the Gaiden chapters.

Some things such as the Drill Grounds, talking to your characters for random items or buffs and the readable lore you can watch any time are things that aren't present at all in other games when they should, the Forge is a good one and not the batshit insane stuff you have on Fates (+15 Iron sword goes brrrr) that requires actual brain and strategy.
Even tho the visuals aren't that good compared to what we had on the WII/GCN, GBA and the SNES but they are fine, at least they got better compared to what we have on Shadow Dragon.

The new-addons are neat that are not intrusive and are totally 100% optional, unlike Shadow Dragon they actually did new content that wasn't hidden by literally having to do a rampage with your own units, the DLC is fine and not as the shit we have with either Awakening and Fates that is just fanservice or a grind fest.

Overall is one of the best games if not the best of the series, you can also play with Wrys 10/10.