Anyone who plays wvw knows its just a blob fest now, because of this in group play and guilds mesmers are losing their place other than the need of a veil they are not much sought after by guilds.
One of the primary reasons is illusions and clones just insta pop like bubbles as soon as they are cast. So the suggestion is small and simple and that is that within wvw your illusions and clones have 2-3 seconds of immunity after summoning allowing the illusion to at least do one attack before it is destroyed.
Targeting is an issue also, for the most popular class’s in wvw such as wars and guards and necros there is no big need for targeting if any at all. With a mesmer you have to target during chaotic blob fights its not much to ask that once we got a target we can at least get one attack off.
Targeting is somthing overlooked when balancing.