I think it is important to state that this is an attractive option mostly because of BG2 and it's pretty deep party interaction system. Even in BG1 party banter was rather minimal compared to BG2. BG3 does not have that. Interaction is basically a one-way ticket between the PC and one companion.
That's becoming less and less true at each update, incidentally. They are adding a lot of scenes where companions address directly each other. Of course, most of these scenes will be wasted/never seen because for how it works currently you'll need to be at the exact place with the exact combination of characters in party to witness it. Which incidentally is even more of an argument in favor of giving the option to bring around more companions.
But you know what? I don't even need to guess if I "would like it or not". I already played an entire playthrough with Patch 4 and a party of six and guess what? It was the most enjoyable one I had so far. More party banters, a better flow in combat, more tactical decisions to make at any given time (even if obviously that made a lot of fights easier), etc, etc.
This DESPISE the default control scheme putting its best effort into making the experience miserable for the player.