re: Poker & Pre-flop raising in PLO8
To get an answer you firstly really need to understand more about Omaha hand evaluation. Quite often contradicing the common perception, Omaha isnt a game (where because you have 4 cards), the hands become closer in pre-flop value ("everyone has a hand mentality").
Quite the opposite in fact. Starting hands drop off from Great/V.good down to v.bad in a very rapid manner (much more rapidly than holdem). There isnt really much mid-strength center ground. The best hands (compared to a massive chunck of the rest) have a disproportionate pre-flop power (compared to holdem), however that power spectrum rapidly dillutes as we go post flop (ie the power is most significant pre-flop).
What you should be concluding as a consequence is that isolation is more important pre-flop, but most importantly isolation where you have already derived value and can imply further value from over-keen limpers. Hence, raising to pot pre-flop is appropriate with strength and multiple limpers.
It is when we move to post flop that value bets catch up with the importance of isolation, and at this point betting less than the pot becomes more appropriate in certain situations eg With a virtually un-assailable nuts, or nuts with improvement draws (freerolling to improvement), then you are obviously more concerned about maximising value or extraction, and not wanting to scare too many off the pot.