I don't like it... It makes us need to expand warehouse more... Sometimes I have important stuff (I'm building up a repository of purples for my purple synth and crystals and Gold/Crystal chests and VIP passes 1 day and 7 day). I don't have enough spaces to spare three more!
I don't mind this 3 space thing but I mind now because EVEN 36 MAX SLOTS ISN'T ENOUGH!! It's pretty frustrating even though I bought coins to expand there still isn't enough when it's already maxed. New update, more items, they should increase warehouse max slots.