You're a Top Rated seller on this ID (which also means Power Seller), with multiple quanity BIN listings, so, on the financial side of things, and presuming you wanted to continue using this ID...

As a Power Seller, you will be able to use multiple quantity and/or variant format even if you ditch the store. Without the store, a BIN listing can have a maximum 10 day duration, and insertion fees will be per item available, not per listing. 

That means, to list the nail polishes, one 10-day listing for 3 items at $3.95 will incur an insertion fee of $1.50, and any that sell will incur FVFs at 7.9% - that's opposed to a flat 20c insertion fee with the store (for up to 30 -day duration), and a FVF of 7% per item sold.

So, leaving any and all other benefits of having a storefront aside, if you work out how many items you would list per month, how many items - on average - you sell, and compare the costs of having a store vs not having a store using the above figures, you will be able to see whether you're better off (financially) with or without the store. 

Don't forget that you would have to relist a 10-day BIN 3 times to equal the duration of a 30-day store BIN - eg the nail polish listing with 3 available would cost $4.50 over 30 days compared to 20c with a store.