FWIW, LRG support won't let my brother cancel his CSH Vita purchase so he can buy the switch version later on. I know that's the policy and all that, but it just feels a bit disingenuous that they'd put preorders up and then immediately announce the Switch version two weeks later, which would've most likely cannablized PS4/Vita sales. As a result, they've pretty much lost him as a customer.
Come on, the timing made it pretty clear that they want to maximize sales by having people double-dip on the physical releases. Your brother can sell his copy when it arrives and buy the Switch one later on, but I get why they did it as a company and this wasn't really the first time they've done this.