Very important article. IMO when we play tournament, we should count stack with number M, not with big blids. Stack M is more detailed and consider ante.
M=(stack) / (SB+BB+all ante).
When my stack is under M8, I play only push or fold. Absolutely very importent is our position what you`re mentioning in the article. I think that for tournaments, we should be more specific about the push phase. I recommend playing with M numbers with this range and our position:
6off=UTG1; 5off=UTG2; 4off=MP1; 3off=MP2; HiJ=MP3, CO; BTN; SB.
Preflop call is OK too, when our pot
odds preflop is good. In this we can call with very loose. Example when I`m in SB and I see 4 limp, I like playing in this call very loose with trash cards, becouse my
pot odds to call is very good and very cheap. Preflop call is not good when our stack is in push phaze. Sometimes in push phaze, we can give a tray play mini bet with AA and never limp preflop.
When low blinds I play x3 BB to x4 BB. I see that you recommend in article to 5 BB. IMO 5 BB is good when tournament is deep. When turbo 5 BB can be too much. When late phaze I play x2.5 BB to x2.2 BB. I agree that our stack is big, we should we can loosen up and take more chances. This is OK, if we manage good post flop.