There are so many big changes wanted ... but here's a small one: Just use a monospace font for the raidboss-damage-numbers (and other areas where this is necessary) so that they are actually readable in that timespan this screen is shown.
Other solutions are also welcome, but this seems the most pragmatic one.
EDIT: After creating it i think it was a bad idea to do a yes/nope poll ... there are the voting arrows on the topic itself :D So if you voted the poll just vote on the topic too, so hopefully someone at bungie will see this and think: hey this is a request we totally could do