Yes missing charge up attacks is a part of the problem that makes the mechanic frustrating to use. To make things worse you’re missing with basic attacks that do no damage so if you miss you’re forced to do another basic attack extending the time that you’re doing no damage. It makes the charging mechanic unfun to play.
There are 2 ways to address this problem; either by improving the charging mechanic so it’s actually rewarding to use or minimize the charging mechanic so you have more time doing what you want to do. I’m for the former - making charges always hit or gain charges even if you miss and having the charge ups effects trigger on both gaining and releasing charges. It would address the unfun aspects of the skills while keeping true to its intended playstyle. The damage of the charge ups would be buffed overall and if you release with a finisher you would get an additional damage boost as well.
Compared with the current mosaic build, you would end up with slower but harder hitting attacks cycles which would save your eyes and frame rate on your computer. It would less labor intensive for the devs to do than having to modify existing graphical assets to address the visual clutter, all they are doing is adjusting numbers.