I think it would be cool to instead of having the extra effort/boost sprint effects locked behind specific shoes, to rather have them as its own cosmetic. For example the shoes from the end of battlepass season 0 or the Season 1 trailer shows the fire shoes with the fire trail. What if i just wanted the trail on different shoes?
People might like a certain effect but not like the look of the shoe and therefore it gets completely disregarded.
In a similar fashion that rocket league has boost effects, you could add it to this game. It would change the focus from making effects for specific shoes to universal effects for any shoe equipped.
Sure it might get rid of the rarity value of the item if the effects become universal but maybe there’s some middle ground? I just think having more customization expression is fundamentally better than locking a specific thing behind an item. Instead of disregarding players who don’t like the looks of things, adding effects that are purchasable in the shop or sprinkled in the battlepass could be a good idea. Instead of having people wait for a potential shoe with effects that they like.