Graffiti gamemode is fun in concept (reminds me of Splatoon in a good way) but the onslaught maps are way too big to make the mode fun in practice. Kills are almost meaningless since they don't directly contribute to scoring progress, and that's assuming players encounter each other in the first place since everyone is spread way too thin across the entire map just taking portals from place to place. The extremely slow pace of point accumulation for the current event also doesn't make individual match completions seem very worthwhile either.

tl;dr
Graffiti needs either smaller maps or more precise objectives to be fun
Tagger event points should be gained quicker