So would G.I. Joe fans, who have been used to seeing characters like Optimus, Megatron, Bumblebee, etc. turning into G.I. Joe vehicles for decades, be satisfied with a HISS tank turning into some "generic" robot and being labelled as a Transformer?
Those characters all had their bot modes adapted to work with the Joe/Cobra alt-modes though; they didn't wear them like a converting cardboard Halloween costume. That's the main issue I perceive most people having with this... it's obviously a cost-saving move resulting in a less than stellar product for a hefty chunk of change. Yeah, something more re-engineered would cost more and Hasbro probably set a goal of keeping it under a Benjamin, but that doesn't mean it doesn't suffer because of it.
All that is to say, I think Joe fans would also appreciate a better bot mode.
Perhaps somewhat ironically, I think Dreamwave's Optimus HISS tank would have made a great Megatron with just a headswap and a few minor detail tweaks:
They originally planned to make Optimus a WHALE hovercraft
And requisite Seekers:
How possible any of these would be to make in three-dimensions might be up for discussion - and they'd definitely be more expensive. But speaking only for myself, I'd pay more for something better.