Lets talk about the boot enchantments.
There are five boot enchantments, Furor, Alacrity, Captain, Distortion and Homeguard but you only ever see Homegaurd for the most part. Furor gives a 12% speed boost for 2 seconds for single target spells or attacks. Furor is good for champs with a single target speed up like Yoricks E or Malphites Q or auto attacking chasers. I think it should give a 6% move speed boost for 1 second on AoE spells for example.
Alacrity gives 20 more move speed. I play mostly top so I would make this my go to enchantment but 20 move speed is not that much in the grand scheme of things. I would like to see it give more move speed or a percent move speed bonus.
Captain gives allies and minons moving towards you a move speed boost. Seems like a good enchantment for fast, hard engage champs who jump in before the enemy has time to blink like Malphite with his ult for example. I guess it would be good for just front liners if you are all pushing a lane after a team fight but it seems far to situational. Maybe it gives a AoE speed bonus or since it is called captain maybe anyone lower level than you gets a speed boost.
Distortion reduces the cooldowns of Ghost, Flash and Teleport and gives them all bonuses when used. I think this is a good and solid option if it weren't for...
Homeguard refill your health and mana faster upon returning the base and gives moves peed for 8 seconds after leaving base. This is really the only enchantment you see simply cause it is such a good option for nearly everything. Getting back to lane or a fight faster. Flying at someone after using TP. Defending your base (duh).
TL;DR help the other boot enchantments compete with homeguard.