Related question: How do you get so much crafting in a day? I get 2-3 in a day, if I'm lucky. That link assumes 4/day is normal.
Do you use time boosters to get more in? Do you just craft something, even if all options suck? How do you not have spell fragments left over after using up all CCs, even with constantly making CCs in your MA?
It assumes "an active crafter"
if you are a player like myself there is always something to craft on each rotation. and sometimes more than 1.
For example: a good time booster, a pet food and a combat buildig, then I want them all.
If it's all junk, there is always a guaranteed small or big timebooster to craft
off course this assumes that you have the ability to check al recipes (of the rotation sucks according to your RL schedul, you can pay 50 diamonds to reset the scedule to something that does fit in your scedule)
When we look at "does the spire give too much" you have to look at it from an active perspective, for anyone who crafts the occasional thingy al;most anything is to much, but when we look at what is realistically possible IF you want to. it actually gives less spellfragments than you could use.