I like the idea but I don't know how well it will work.
The clip as it is, sits recessed into the caliper by several mm. To add a plate to the front that will cover the caliper like your pictures suggest, you'd need spacers of some sort between the clip and the new plate.
Also, would a plate on the front impede fitting and removal in any way? Spring clips can be right buggers to get on and off at the best of times!
Just how many Yorkshire sheep can you fit inside one exhaust?