Well it looks like everyone who would rather defer to the less accurate linesman for tight calls will be seeing their preference enacted and IFAB will be reissuing guidance in a couple of months to say VAR should only be used for clear and obvious in ALL circumstances, including offside.
I have my reservations whether this will be any better, you'll correct all the calls that are yards offside/onside but anything closer than that and we're just going to defer to the linesman and hope his guessing game is up to par.
If the guidance is heeded appropriately it will a good middle ground for exactly the reasons you describe. Implicitly no worse than just having a linesman, but with the added benefit of overruling the more glaring errors like Eto'o in the CL final. The 'guessing game' has been around for years and it's the blatant offsides/onsides that annoy people, marginal ones sure you might get a bit of noise but if it's that close people will just get on with it. You'll also in theory avoid the lengthy delays only to result in a contentious decision anyway because the images are open to interpretation, there was some Spurs game earlier this season where VAR went on for a couple of minutes or something ridiculous.