Они и в 5.0.5 не смогли исправить проблему с зажёвыванием игнайта основательно , поэтому и изменили механику дот, чтоб вопросов больше не возникало. А по поводу каты и более ранних патчей вот что близы отвечали Since the design of Ignite doesn’t allow us to resolve munching (defined as multiple simultaneous crits that fail to properly proc Ignite) directly, we’re thinking about a solution that would instead prevent Ignite from proc’ing on periodic crits. This might be a minor dps loss, but possibly no dps loss at all since it would stop most cases of munching. If it turned out to be a dps loss, we could compensate for it elsewhere. You're likely to see some experimenting in future patch PTRs. This is a pretty good example of something we can't hotfix, or rather wouldn't try. It’s the kind of change that would likely have unpredictable side-effects.