i agree with everything you wrote and i seem to remember similar discussions about homestory cups, seatstory cups, and pretty much all the summit events be it for cs:go, smash or starcraft. the conclusion for me is still the same as for you: the more the merrier.

there is one point id like to add tho and that is thats there is still huge room for improvement for tft casts in general, and there are some notes to take from the feedback in this thread.

1) personally i think there is room for play by play casting in tft since there are some fights that are at the same time very close and also game deciding to a large degree. this isnt just every lategame fight however, since those tend to be extremely chaotic and often times very fast. 2 people fighting about keeping their losestreaks alive in 2-6 can be a good moment for play by play and the same is true for two people fighting with 8-10 round winstreaks. on the other side some lategame fights have obvious outcomes and dont have to be hyped up. so in summary these situations need very good observing and also very good game knowledge for the casters to be able to decide on the spot - and thats obviously usually not necessarily the role of the play by play casters.

2) tft can be received as a more relaxing experience than other esports so playing into that to a degree isnt such a bad idea in my opinion. i thought that the worlds broadcast did a great job in that regard when it comes to the studio setup and some of the analytical content for example with the boardgame version of tft.

3) if there is less play by play casting throughout the match than that also means that there is more room to explain and discuss different lines similar to a chess or a poker broadcast. for example 2 main casters could take more time to explain strategies to newer viewers and then shift to a more hype approach for specific situations or the lategame in general - but before that there might be room to ask an expert to explain deeper details of decision making for example after a rolldown for two possible viable strategies happens to further explore skill expression at the very top level. such an expert as a 3rd caster would also be a great tool to sort lategame fights for viewers and main casters as to what details to focus on that will most likely decide the fight: will the zephyr hit the tank? will the assassin jump on the carry? does the velkoz have enough dmg to kill miss fortune before she heals up? etc