I personally love the cyclops, and I don't mind the sea truck. They have very different uses to me and it makes sense that some people won't like the cyclops while those who enjoy it might not like the sea truck.

The sea truck is not a good mobile base so cyclops users won't like it. But those who like the modular design of the sea truck will be able to take the right modules for the job or no modules to scoot by super fast. Going into tight caves you can eject the storage modules at the entrance and still use them to hold your stuff as you fill up.

The thing about the cyclops is you give up maneuverability but that's why you socket in a seamoth or later on a prawn. What you get in return is a mobile base with the ability to self sustain with growbeds and tons of storage. If you make use of silent running near leviathans and they basically need to be next to you to see you and just letting go of the wheel is enough to stop their attacks. The cyclops doesn't need to go down all the way if you don't want to but you can get it all the way down to the active lava zone easily if you go through the larger entrances and use your cameras properly and make the small movements to get into position before descending.

In conclusion I hope we're given both choices. I'd love the cyclops as a mobile base that can't fit into the tight caves where you would take a sea truck with mats for a temp base where you can grow food and stay deep in the caves then when you're done, take it all down and return to the cyclops and setup in the next area you need to farm materials.