The BP system will not affect skins but will affect the way you craft tools and guns. Instead of pressing Q to craft let's say an AK, you'll first either need to research the AK by finding one or taking them from another player. If you're successful in the research it will give you a BP which you then can use to craft additional AKs and all additional weapons. You can also find BPs in monuments as you would any other component but it will be a very rare drop.
If you find a duplicated blueprint which you already have learned it will stay in your inventory to which you can then give or sell to other players. This system is designed to prevent fresh spawns from crafting an AK in the first 20 minutes of playing. But the issue most servers will face is that BP's do not wipe along with servers and can go months with the same data causing players with progression to basically become alphas unless the server wipes BPs everyone which would be very rare.
TL: DR
To craft a weapon you'll need to research an existing weapon or find a blueprint. Dupe blueprints can be traded or sold. If in the event majority dislikes the BP system all EZ servers will allow players to learn all BP's on login.