At the cost of double the ki. For only 13 points more. If I'm going to be spending ki at double the rate, I'd better get a lot more than just a 13 net gain.
Ok time to bring some real math into this discussion assuming an actual Monster.
Against an Ancient Red Dragon (2014 version) AC22 +16 Con save with 3 legendaries
A 2014 Monk using FOB, Focused Aim and Stunning Strike over 2 rounds averages
57 damage and uses
9.6 ki on average
A 2014 Monk using FOB, Focused Aim and Stunning Strike on the first round and QP on the second round averages
83 damage and uses
7.8 ki on average.
If we take Stunning Strike out:
A 2014 Monk using FOB and Focused Aim without Stunning Strike averages
57 damage and uses
4.4 ki on average
A 2014 Monk using FOB and Focused Aim on Round 1 and QP on the second round averages
83 damage and uses
5.2 ki on average*
This analysis includes crits, advantage for stun and legendary resistance
* Both of these assume the Monk trying QP uses flurry of Blows on the 2nd round if they do not hit at all on the first round (1.5% chance).
The base 57DPR Monk numbers above are without any subclass. For comparison a Fighter with no suclass, GWF and a Greatsword does 57 average average per round or
114 over two rounds burning both Action Surges.
If that Fighter is a battlemaster he does 100 DPR in 1 round and
157 over 2 rounds using all his dice on precision and Trip attack and all his action surges.
A Long Death Monk using Touch of the Long Death twice in a row does
121 over 2 rounds if the dragon relies on his saves or
110 if he is going to use Legendaries to lower the damage on a failed save. Note this includes no bonus actions, but does use all of his ki.
All you have is anecdotal evidence, and that will never fly.
As opposed to less anecdotal evidence and what you claim other people have said but can provide no conclusive proof.
Oh and I also have math on my side.
Tell me, are you going to claim the 2014 Monk is better than the 2024 Monk?
It depends on what you mean mean by better.
Is the 2014 Monk more powerful than the 2024 Monk? No, it is not even close. In tier 4 the 2014 Monk is well below most (maybe all?) of the 2024 non-casters and all the casters as well.
Is the 2014 Monk more fun to play with other 2014 characters than the 2024 Monk is with other 2024 characters? Yes absolutely.