Stall
Would another pitfall be asymmetric lift caused by one wing Stall on takeoff, causing an unrecoverable roll into the dead wing with noseup?
The US has had mixed success with swingers: It was the only way to get Mach 2 Onboard the Carrier (F-14) The F-111 was supposed to be Carrier compatible, but rejected by the Navy, so its Swing ended up being unnecessary. Heavy, high maintenance, expensive.