There is a good reason new makers with limited equipment and experience need to start with simpler steels like 1084, 1075/1080, 5160, 8670, and 80CRV.
It is, that if the HT isn't right, you get basically 1084 with some extra stuff floating around in it from higher allow steel. 52100 is a good example ( as is 1095) of steel we tend to advise against starting on for this exact reason. Without exact temperatures and soak times ( plus needed thermal cycling and normalizing) these steel may not harden properly and/or will not reach its full potential.
The full carbon and alloy content will not convert into the structures desired. The blade may seem hard, and will cut well, but is is just a 1084 blade, not a 52100 blade or a 1095 blade (more or less).
It has to do with metallurgy charts and time. The eutectic point will allow .84% carbon to combine with iron easily and almost immediately upon reaching around 1450F. The rest requires more heat and time.
I haven't seen GrimRepo's knives or tested his steel or what equipment he has, so I don't know how they are, but as a rule, without a HT oven and some experience, you will not get the full potential from 52100.