A grass type Eevee evolution was something fans speculated and wanted since gen 1. Leafeon finally came out in gen4 and while it's a cute design with good enough elements, like anything fans wait a long time for; it's always going to be a little disappointing in your eyes compared to what you imagined.
I will add That Leafeon's final design is pretty cute and works with its element overall; this is just kid me talking. Glaceon on the other hand...would you know it was ice type if you didn't know?
Also amazing to find Leafeon was planned since gen 2 with a beta design and everything!

So here are some of my redesigns.