It would be nice if they looked at Exterminate spawns/total kills required. 300 + kills is somewhat excessive with the way spawns currently work, and larger clusters of spawns would be helpful.
It drives me nuts that 10 years in you'll sometimes have long periods where nothing spawns. Getting to within 10-30 seconds of the end of a void relic mission and still needing 1-2 reactant is nerve wracking.