Ferocitus
Deity
? The UI is a core game feature and an absolute foundation of user experience. If you have none at all, you literally can't play. Beyond that extreme, the UI is among the top reasons players don't finish games...the reason this debate came up in this thread. It might not be the top reason, but it might be. When you play 100's of turns > minute/turn for many of them on bad UI adds up, fast.
The game not ending close to when it's over was identified as a problem, and this is a part of the game that is objectively putting hours between those two things compared to a good UI. Complaints about "pacing" are also tied to this in part.
Your putative changes to the UI might suit your play style better, but you have
no idea whether it would be suitable for the many other ways of playing the
game, or whether it would be better for absolute novices, or for players moving
over from Civ 5, or me.
The UI suits the games I play, and it certainly doesn't slow me down. I play
at marathon pace against 25+ other civs on ludicrous size maps. An extra click
or two is insignificant compared to the times taken by other parts of the game.
The UI is also more than acceptable to hundreds of thousands of other players.
IMO, Firaxis recognise that their vanilla UI might not be the best for everyone,
so they made it moddable. If they wanted to force one UI on everyone they
could easily have locked it into place permanently.
If the UI doesn't suit you, then write one for yourself, or avail yourself of
the others on offer. I don't accept that you know what is the best for all
players, all the different styles of playing Civ, and for all time, irrespective
of what innovations are in the pipeline.