very well said: Béla Guttman from Hungary, as well as Helenio Herrera a French-Argentine and Fernando Riera a Chilean all 3 football/soccer coach giants from the past did an huge influence on young ones José Mourinho from Portugal Guardiola or Del Bosque as in many others. However influence is not to be clown, or do copies. Each one got his own training idiosyncrasy.
Your question about hills and why i disagree with Lydiard hills got to do with season periodisation. If you do weight training - something that i don´t you - or you do other kind of strength training that is more anaerobic than the aerobic training, buy in the same training session you also wants to do aerobic run, the right order you shall organize that training session is to go for weights (or strength training) early and aerobic run later.
Or the hill training that is considered to be more anaerobic than the aerobic run, and don´t forget that hill training is cardio-vascular but also neuro-muscular. There along the season periodisation the hill training shall be placed early in the season AND/OR included in the aerobic basic phase. This is the way the FInns . that is a quite flat country, they do place hill training. If you take a look in the original the Finn Haikolla training, the coach of Viren, Paivarinta, or the trainjg of Tapio Kantanen, they all did the kind of training Lydird influenced but they did hills during his winter season and not put in between the winter aerobic season and the spring pre-competitive sand competitive season as Lydiard did,
If you take a look in the Pekka Vasala training - that his coach was another Lydiard influenced - not a Lydiardist clown - the training that Vasala did and that lead him to 1500m olympic champ in the 72 olympics, he did hill training spread along the winter and spring sesons. I might say that Vasala did hill sessions rom October to April.
If you take a look on Coe an Martin training of Sebastian Coe he did hill intervals but since the start of the season of training up to the competitive season.
Also the portuguese Rui Silva did 300 hill intervals but during the winter build-up season.
You need to know the source of hill training, to come to the conclusion who did invent the hill training.
The hill training was done first by the Finns, the Swede runners since the 20s. The first coach to take the hill training intoto the rn methodology and into the season periodisation was Costa Holander from Sweden, the same that did formulate the fartlek training in Volodalen.
However they way they formulate that kind of hill training, that is difference in the way to do hill up and down than Lydiard, and they he sees the hill training as a kind of fartlek up hill, and they did chrono the hill up, while the runners did recover with jog back.
You can see how they did it in this video documentary from the 60s. Pay special attention from 4:00mkn to 5:00 of the documentary
Voladalen
http://www.ina.fr/sport/athletisme/video/CPF04007162/volodalen.fr.html
What we see there ? We see one disciple of Olander, Costa Holmer, on the top of the hill take chrono results from the runners that do hill fartlek. In the case this is one Volodalen documentary from the french top runners from the 60s - MIchele Jazy, Jean Wadoux and some others.
Then, Lydiard that the documentary says that was in also in Volodalen, he did learn the hill training way and was influenced by that kind of training and take it to NZ that is also hilly and good to run hills, However Lydiard instead of place the hill training during the aerobic season - where he should be placed by the reason of methodology that i mean ahead - place that training in the middle fo the aerobic phase and the anaerobic phase and consecrates one ecial phase to that kind of training.
I could go on and on, with more information and more examples how to place it the right way into the season, that is during the aerobic season right from the start of the aerobic season and spread it during that season and e not start the hill training sessions just in the mid point of the season.
Besides some runners need hill training more than others. Some runners by his special ability they don´t need hills at all. Some others need to do hills instead of anaerobic training and instead of aerobic intervals.
Finally, actually there are several different kind of hill training, all depends of he speed pace up and speed pace down, all depends of the number of sets and the kind of recovery. Also al depends of the percent of gradient.