Just wanted to mention, that switching weapons is not a big problem, if you sue the Bandolier (sp?) function, and don't mind your weapons getting moved around in your inventory. Octavia refuses to use it because, she is very particular where all of her items go, and refuses to leave space in the 1st bag for weapons to be swapped in and out of. In such cases, manually switching can be a pita, but she still does it from time to time, when really needed.
I've almost never had a problem with snares getting dispelled, but many effects are short duration. The particular weapons I linked previously are all 3+ min. snares, and all but the Tserrina's Whip are 55% snare effect so mobs stop moving completely at 20% health.
The only real problem I've had over the years with procs, is proc rate. Years ago, when AAs were slow to get pre-65, I never used my Rng epic 1.0 to slow mobs, once I had better dps weapons, due to the time to proc and not get resisted. However, back then, my Dex wasn't maxed, had no Weapon Affinity AAs, and if there were mod2s back then, I didn't have ay items with Combat Effects on them. Also, there weren't Audio Triggers, nor did many people have the Inspect Buffs rank 2 LAA, so you had to keep a close eye on emote messages to know if the right proc went off and landed. But even at that time, those with the AAs, and stats, often used their epics to slow, and raved about how effective it was.
Now-a-days, with Health of Target's Target window showing spell effects for those with Inspect Buffs LAA, which many have now, and the use of Audio Triggers, along with it easy to max stats, and get AAs such as Weapon Affinity maxed at low levels, along with the abundance of defiant gear with tons of mod2s, especially Combat Effects, procs rarely take more than a few seconds to go off, and resists are pretty uncommon in general, unless the mob in question has high magic resistance. As a example, a few particular (indistinguishable) LP Worgs are highly magic resistant, and I'll give up slowing and/or snaring them after a couple of resists in a row.
That's just my take, your's may be different.
Yther Ore.