Revision of encoder core-coder structure

Solves #2039 (closed): remove unused parameters in encoder core-coder structure.

Note: this MR is done on top of !2258 (merged), i.e. it contains a removal of duplicated TD renderer substructure, too. I let it up to reviewers whether a step by step review (!2258 (merged) first, merge it to main, then update and review this !2259 (merged)) is preferred over a one time review of !2259 (merged). (tagging @multrus for awareness).