And again, a lot of it comes down to 1960s TV production techniques vs. modern TV production.
Yes. It would've been interesting if, instead of exactly copying the original sets (aside from subtle upgrades like putting actual video screens in the bridge wall monitors instead of wrinkly astronomical art), they'd upgraded the details of the technology while keeping the overall aesthetic, thus offering a more modern approximation of the futuristic look the '60s artists were aspiring to create.
But I guess "Relics" and "Trials and Tribble-ations" had to copy the sets exactly because they were reusing stock TOS footage. (In "Relics," they only had the budget to build one station and the turbolift alcove and rent a fan reconstruction of the captain's chair and helm console, so the wide shot of the whole bridge was stock from "This Side of Paradise.") So they didn't have the option to upgrade the sets, and that pretty much locked in the idea that 2260s Starfleet technology actually did look that way in-universe. (Just as "Trials" locked in the idea that 2260s Klingons had no ridges, whereas before then, the shows had always skirted the question.)