if you make each class/gathering skill/crafting skill harder and cost more time and LP then people will want to make alts to specialize in each class/gathering skill/crafting skill.. it's literally the same problem we have now you're just saying to add more of a grind, which would just mean people have to work harder on their alts but it doesn't remove the problem with alts..it would actually inspire more people who don't use specialized alts to start using alts because the grind wall would be TOO big for just 1 character.the problem with alts is a byproduct of the LP system. Remove LP and you remove the benefit/need of specialized alts the way they r being used now. Everyone knows this, even the devs know this.
open millions of characters as ONE person. you dont have 5000 hours for each line to complete them in your millions of accounts. you are only one person.
"the only way would be opening 4-5 clients simultaneously." even you open multi clients, now you have to control them by macro tools, etc. cause you are not a octopus.