If any of you have played the later Tales games, like Tales of Graces F, you'll know that Namco solved the clutter of too many damage pips for you in a very intuitive way; consolidated damage numbers that hover over the character for a time, soaking up all damage and presenting it as the total damage so far, since the last time the enemy didn't receive damage for X amount of time.(2 seconds?) with smaller damage numbers appearing underneath for individual hits.
I've asked for this to be added to Warframe before, because damage pips basically become useless in the endgame, not appearing for enough time and in too high a quantity to be effectively read anyway, and while the changes to damage pips are positive and welcome, they don't address this issue of legibility/usefulness that consolidated damage totals does.
Another thing to consider, especially for something like consolidated damage totals and static/2D damage pips from the new Melee damage pip changes is limiting the horizontal scaling of the damage pips, so that they become taller/more squished the larger the number is, preventing visual clutter.
Of course, allowing these things to be customized is good for the player, as the end user can tune their damage pip experience for optimal satisfaction, but the usefulness of damage pips is still very lacking in Warframe compared to it's contemporaries from over a decade ago.
On the more visual flare side, fonts and effects would also be nice, but given the frequency of damage pips, I'm not sure the performance impact makes that viable.