Let's not even go into the internal logic of the OP - 'let's ditch a mode barely a week after it's been released that lots of fans wanted, helps boost out the actually very small amount of offline content in this full-price game, that I don't personally enjoy' - I think that's been done to death.
And I really don't think the 'oh offline players HATE online players!!!1' argument holds water either - what offline players get angry about is the increasing trend in AAA gaming to tie offline single player to online multiplayer, or in lots of cases - like Titanfall and indeed GT Sport basically on release - have next to no single-player content at all in favour of making the game exclusively online. Which just doesn't work as a value proposition for a full-price game. But with EA and others trying to push the 'games as service' model (ew), understandably people who enjoy playing games single-player are getting annoyed. It's not directed at online players though - ultimately, you do you.
As for me? I'm someone who's played every single GT game, 1 through Sport. And here's how important career mode/GT Mode is to me - it's a big reason I rank 2, 3 and 4 as the best games in the franchise, and equally a big reason why I rank 6 as possibly the worst. I was upset with how they butchered the career mode and made it into a forced linear procession, with the endurance races at the end of it all reduced to 12 and 24 minute sprint races. I remember when the 'beginner' enduro race in GT2 took about 45 minutes to complete even in a relatively fast car - maybe showing my age here, but, eh
The lack of career mode is why I didn't buy GT Sport originally. Now it's back in, I got it - but still only in a Black Friday discount. I still don't think there's anywhere near enough content in the game for full-price, personally, but maybe with the online modes it becomes better value. But regardless, I was delighted that a proper GT League exists in the game.
Unfortunately, the issue with GT League at present is very much the same as the rest of the game; pretty good, shame there's not more of it.
I actually think it's a
better progression than GT6. At least it makes some sense, there's a nice variety of tracks, and you aren't XP grinding or forced down a linear path of events. And what I've played so far is good; nice variety of events in Beginner and Amateur Leagues. I like the fact proper endurance races are back - 30 and 60-lap races are much more like it, way better than the farcical 10-20 minute sprint races that still tried to feature dynamic weather and day-night cycles that went by in the blink of an eye. So props there. And so far, unlike the OP, I've been playing in the spirit of old GT games - finding a close race and matching my car to the AI. And generally I've had a lot of fun. The derpy AI piling off the track when I'm gearing up for a proper battle can get a bit annoying, but otherwise, decent. 👍
But really, TWO championships in Professional and Endurance Leagues? Repeating championships by the Amateur League? In a game already fairly malnourished on content? Hmmm. Not a good look when dropping a much hyped new feature.
I'm sure it'll be easy to add new championships in, and it's not just more that will be needed - it's more variety. There's whole classes of car currently not represented in GT League - unless you go full overkill, I can't really see anywhere for Grp.3 and Grp.4 cars to compete? Even stuff like the Like The Wind challenge of old, a GT World Championship, GT All-Stars, etc. Stuff that was there in previous games, and I don't think will be too hard to add in - repeating championships by the second tier, especially fairly dull one-make ones, isn't a good look.
Oh, but there's a championship for non-race cars that cost over 10 MILLION credits? What's that, three cars in the entire game, basically? Okay, great. /sarcasm
On a core level I'm really enjoying GT Sport single-player. It's the usual high level of polish and execution, the cars and tracks look, drive and for the first time SOUND great, and the AI acting more human and actually driving more aggressively is nice - I just wish they were a bit more, y'know, actually competent at driving. But gdi there needs to be MORE of GT League. Not less, as the OP is suggesting.
Anyway, rant over. This is making me want to break out my old copy of GT2 again...where's my starter car thread?!