I use flash a lot (anytime indoors)... because I am not a fan of high ISO. High ISO is great when there is no alternative, but it is never first choice for me.
And normally the speedlight is on the hot shoe (bounce flash when possible, etc), I use both Manual flash and TTL flash at different times. I think a TTL flash is extremely useful, and we should have the option, even if we can still select manual flash mode.
For two flashes not on the hot shoe, I often use manual flash with conventional trigger modes (which for me is rarely radio triggers), but sometimes I will use the Commander (and sometimes TTL). Commander works well for me indoors, with two remote flashes. I guess I think of Commander for the quick automatic shots, it is great to get in and out quick (with TTL). Commander TTL offers lighting ratio as an easy automatic option. Still, I favor manual flash and a hand held meter for anything more serious with more time to fuss with it (and often with studio lights). Except of course when the subject is moving fast.

TTL seems required for action, unless you focus on one spot.
HSS, I have had no use for it. It is fun to play with, but I find no realistic or necessary use. IMO, the only possible use would be portraits in bright sun, but only then when you want to use f/2.8 for no depth of field. I never do, I'm a big fan of depth of field.

So otherwise, conventional TTL flash compensation works fine for me in bright sun, I have no issue with f/11. In sunlight, HSS probably cannot give faster shutter speeds for stopping sports action, because that action is typically beyond the range of the minimal HSS flash power. If not in sunlight, regular speedlight flash mode runs circles around HSS, power, range, motion stopping, etc.
The HSS concept was invented long ago (I dunno when, but I know more than 60 years ago), with longer burning FP flash bulbs. Camera FP shutters synced flash at only 1/60 second back then and the longer burning FP bulbs allowed faster shutter speed, considered a plus sometimes (and of course, often it makes no real difference, when the ambient is not fully exposed). HSS is same thing for electronic flash.. But today, shutters are much faster, 1/200 second, and the D7100 and others can do 1/320 second with flash.
But if the camera does provide the feature, be it TTL, or Commander, or HSS, it would seem very reasonable to get a flash that can also do it, in case something does come up in the future. We don't have to use it. But things do happen, and minds could change. TTL certainly seems like the first essential to me.