Why? it would f**k with egg sets and it would be super expensive because it would be rare compared to others because marked accumulated a lot of other egg until now.
Was comparing to the price required for tier 3/4 weapon mods so in the grand scheme of things finding 1-3 eggs during the entire event might save you a day of mission grinding but i do agree that the rest feel underpowered compared to the 50 energy one and i was aiming for an average.
What's wrong in adding another egg? Purple could be the new white egg. Eventually it will also go down in price after a couple of years.
It's just an incentive to add another variety of colour. Besides, there's currently no other way to earn mission points. Who knows, you might be just 2 credits shy from purchasing a book. It is useful. Just as useful as the other eggs' bonus bar the energy one.
But you might be correct. For all we know, Ched might shut it down because it might need 'reworking of the eggs set' to add in this one and not worth the hassle.
If you would add bunch of different eggs that mixed with old ones would make other sets leaving the old set requirement same I would think it would be a great idea.
For example, some mix of eggs would give 100 nerve (max 1 times use per day)
Oher set mix would give 150 energy (max 1 times use per day) (in this one can be your purple rare egg :D) ...
just asking adding one extra egg doesn`t bring much value from ched perspective (no new content) and he would need to rework eggs set and balancing new egg drop rate that new players had a chance get set merit too, so it would be too much work for too less content