I also think the key point is being vastly overlooked regarding transfers in & out. People say you can't move forward without buying players yet we've progressed to the final of the biggest club competition in the world.
Yes our league form has been erratic but overall can anyone really say that the vast spending done by the likes of Everton, Chelsea etc has really altered our status in the game domestically? We had some erratic results but up until the Burnley game the squad had shown it could hold its own and was within a couple of points of two teams that arguably have produced the most scintillating title challenge the Premier League has seen in terms of quality.
If our form hadn't dropped so poorly we would have been sitting pretty in third comfortably, our form in the early part of the season suggests so.
Pochettino and the players have developed new skills this season, ones more focused on tact and responsive, reactionary levels and that will only hold us in good stead moving forward. The club took a chance, just like a club does when they do end up signing someone and it seems to have been the correct decision based on league and cup competition results come the end of the season so I don't really see why people still have issue with last summer. It's been, gone and the club were proved right based on the outcome 9 months later. Nothing to see here, in top 4, in the final and have twice as much money for our troubles for doing so as and when we require spending it.
Making the CL final doesn't mean we've progressed in real qualitative terms. You say has the spending of Everton and Chelsea made a difference, well yes it possibly has, Everton were 28 points behind us in 17/18, they were 17 behind us this year, Chelsea were 7 points behind us 17/18, 1 point ahead of us this year.
And you say "until the Burnley game" we were up there, but that left nearly a third of the season left, a final third in which our form was relegation 14 points from 12 game which is absolutely atrocious, and would surely have been better had we not only had Sissoko, fucked Wanyama and Dier to rely on as midfielders for most of that spell?
I'm not advocating we sign players for the sake of it, I rarely get excited by our signings and haven't overly rated much of our transfer business lately, and I would argue we would have been better off also if Poch had made better use of the academy players too, but how anyone can say the decision not to improve the squad was a correct decision or was a "success" is hard to fathom, whether that be better signings or better integration of academy
We have slept walked into needing a bit of an overhaul (Poch has suggested this himself) not just a couple of minor upgrade tweaks. Never a good situation.