I don’t want to self-promote or anything, but this can help with your achievement farming. I know that achievement is initially quite frustrating. Good luck with it.
On-topic:
I do believe ISIC is in a really good spot. They need to make the overcharged dash better and easy to execute. I think its currently still bugged like it was in the Open Beta which means you cant even use that part of his kit (Overcharged Plasma Dash). Though this probably isn’t a problem with instant cast abilities enabled. I prefer seeing where exactly my Plasma Dash is going before I use it.
The CD on his shield is fine IMO, but I usually do reflective Wards builds where I try to keep them up for as long as possible. Dash CD prevents him from being the most obnoxious character in the game. have you tried backdooring with him in Incursion yet? He can 1v1 the Sentries. A high Dash CD punishes him for doing this by removing escapes when the enemy is actually aware of him.
Then if you get the stun augment for his dash, he is accepted into the exclusive club of Battleborn who can stun entire teams (potentially). The CD of his dash affects the balancing of this as well. Needless to say Kelvin will always be better at this in most imaginable cases and especially after he gets the -5s cd on chomp, but ISIC being able to CC everyone and escape at the same time is still a powerful tool even if less so than someone else’s.
If I was going to buff one thing on ISIC I’d make the Aegis 75% as good as everyone else’s literal shields rather than the 50% it is now, or give him a talent that makes shield regen more while using Aegis in combat.