Other MMOs have dps trackers and in some instance even have logging which is where every ability is tracked during the fight. This allows other MMOs to have better balance. If you look at WOW the difference between the best specs and worst specs is 10-15% dps difference on single target. Compare this to DDO where THF is over 50% behind in dps behind some other builds. But its not clear to many players that there is that large of a gap so they think their THF build is good to bring to raid. WOW also does a good job of making you want to bring each class because they have unique raid buffs that will boosts the raids DPS or survivability by 3% ish.
Also talking about how many different combinations there are DDO and saying you can't balance for it is absolutely BS because even with all those combinations if you want to do top tier dps right there's probably less 5 builds (+small variations) that are competitive right now. And the people that play those builds and know those builds understand why they are competitive and why other builds can't be.
Finally on balancing melee versus other specs the biggest reason to never bring melee to high reaper raids is because of boss cleave attacks. Suulo's autoattacks have something like a 270 degree arc for hitting and if he ever moves suddenly melee are in danger of being hit and at high reaper are in danger of being 1 shot. You can also look at all the dragon fights we have and the tail slam as being another case of something that a melee has to deal with while ranged just get to ignore. WOW only have bosses single target the tank for autoattacks and then they have abilities that are visually represented that can AOE. Another thing WOW does well is that these abilities can be applied to affect both melee and ranged such as swirlies that you need to dodge that are spread out over the whole arena. If this was applied to DDO then melee would be much more skill based to not get hit versus the more luck based that it currently is.
Also talking about how many different combinations there are DDO and saying you can't balance for it is absolutely BS because even with all those combinations if you want to do top tier dps right there's probably less 5 builds (+small variations) that are competitive right now. And the people that play those builds and know those builds understand why they are competitive and why other builds can't be.
Finally on balancing melee versus other specs the biggest reason to never bring melee to high reaper raids is because of boss cleave attacks. Suulo's autoattacks have something like a 270 degree arc for hitting and if he ever moves suddenly melee are in danger of being hit and at high reaper are in danger of being 1 shot. You can also look at all the dragon fights we have and the tail slam as being another case of something that a melee has to deal with while ranged just get to ignore. WOW only have bosses single target the tank for autoattacks and then they have abilities that are visually represented that can AOE. Another thing WOW does well is that these abilities can be applied to affect both melee and ranged such as swirlies that you need to dodge that are spread out over the whole arena. If this was applied to DDO then melee would be much more skill based to not get hit versus the more luck based that it currently is.