I think if you call the "intensity" phase "peaking" it will be more clear to people what the purpose is. Intensity is one of those poorly understood words. Hell, half the people reading it will probably think it means "you try real hard" for that phase.
Honestly I had never heard of the term "intensity phase" until the DFT sticky. Traditinally the term peaking was always used in periodization of any type. And, honestly I think it's more accurate.
Volume is another troublesome term for people. I would call the "volume" phase the loading phase. Volume is a better label than intensity above since high volume is par for the course in loading phases but taken together it could confuse people, especially since most don't bother to read anything. And it's volume of a different character than so many people think of, which is sissy weights done for thousands of sets
. The loading phase is, after all, fairly "intense" in itself. It may all seem minor but I believe one of the biggest problems is that of terminology.
The only other thing is that delaod and intensity are really the same thing. The deload week is only seperated out because there is no weight progression. But it's all in reality really the same phase and it all constitutes a "recovery" phase as well as a peaking phase.
If fact it is quite possible that a person could slightly increse the weights on the first week (say on the last day) and just continue one from there and still recover quite nicely (not that I would do this). That person might drop the weight back a bit on the first day or something but the whole point is that recovery and peaking are synonomous.