I don't think a Ranged Physical class with cast times for attacks is out of the question, people just didn't want existing classes to be changed into that which was why Bowmage was not particularly well received...

As for status effects, the big problem is they rather easily become a must-have... There's a reason why every buff and debuff has fairly similar levels of effect, and somewhat low ones... Like 5% damage or 10% crit... It's to stop one class from having the most powerful buff and becoming something that every raid would "need" to have...