I'm not talking about introducing them now, but once the launch mess is taken care of people will become more vocal about it.
"Pay for a second account to be able to experience different playstyles" isn't really a justifiable attitude.
I do hear ya, it's forcing me to really consider what i want most out of my playstyle long term on one character and is a challenge for sure, rerolling and retraining is a tad time consuming when things don't go how i thought they might.
Most original MO players had 4 slots and a few one man guilds had multiple accounts with crafters, tamers, foot soldiers, fat mage, MCs, gatherers, key holders, etc etc,
I don't think old MO players were too happy to hear that there would be only one slot for MO2
people were VERY vocal about it but Henrik/SV doubled down and said it will be a core part of MO2 features, for reputation, trade and other reasoning I forget but made sense at the time
it will go towards avoiding a lot of cookie cutter meta build spam and encourage more thought to nuanced playstyle priorities theory-crafting and character development,
which at this stage i'm pretty rubbish at
good arguments for different point allocations, economising of primary & secondary, action vs profession etc should have a chance of being heard as new things are introduced later
A compromise ( which I can't see happening ) that is still in keeping with the one slot one character format,
might be that you get the option to save your current build, with all the skills and stats as they stand when you save them, as a backup before deleting/rerolling,
maybe the option could be given to revert to the previous build after a month as an option or just delete/reroll anytime.