Why exactly is this seen as “a problem” if you are here to enjoy dynamic events? This is likely not going to be a well received post but seems to me that a “train” of mobs coming down your way unexpectedly is no different that being out farming ore and having one “pop” on top of you when you weren’t prepared or planning for it. Meh. So what? It is an opportunity to have some fun at trying your hand in a different situation.
If there are simply too many for you to handle, you are going to know pretty fast. You can kite your way out of it, see if any others join you, or just take your lumps (unwelcome though they may have been) and rez at a waypoint.
Wanting more control over mob behavior to the point of asking ANet “fix it” so they don’t chase you instead of whoever originally aggroed them and just reset is tantamount to asking them to re-program the entire mechanic of dynamic events in the first place.
Bottom line is, if you know this occurs in the game, try to look at it as one more in a series of things in GW2 which are there for you to be aware of when out and about that can be fun – keeps you on your toes and can make for more interesting game play not necessarily a source of immediate annoyance and reason to flame other players and assume they are a__hats for interfering with YOUR experience.
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