Inno is a business, and wants people to spend money. Their goal is for the events to be somewhat rewarding but very few non-spenders should get the highest value prize. People who think they can have it all for free will continue to be unhappy.
This is pure BS...
If you are an
Active. Daily. Player, which IMHO would be defined as; waking up between 7-8am, logging in every 3hrs to collect regular production cycles, set the 9hr 'sleepy time' stuff around 10-11pm, rinse, repeat every day.
That means you're averaging about 25-30 incident collections, on top of completing the full quest lines. That's a helluva lot of work, and such dedication
while also always choosing only the most GP efficient chests every time, should be rewarded by obtaining ONE (and only one!), Lv.10 building.
Now, start being a bit less active, like say only logging in every 4-5hrs, or even less (which will also mean far fewer incident collections), and/or not not choosing chests with much thought, and/or not quite finishing out the quest line, etc...
Then yeah, no Lv10 for you, unless you throw some diamonds at the event to compensate for less active play and/or poor decisions on picking which chests to open.
Yes INNO exists to make money, but it's also far easier to make said money with a generally happy & engaged player base.
If evolving buildings suddenly mean that to even get 1x Lv10 building you suddenly need to;
- 100% the event while maintaining 'daily job' level activity
- only choose the most GP efficient chests every single time.
- wait an extra month for the next FA, then hope/pray your fellowship can clear all 3 levels for the 2 missing artifacts
You're going to have lots and lots of very disgruntled players, as the level of work required in no way matches up to the end reward...
And let's face it, both the Gingerbread House & this new Love Nest are steaming crap. If they were Phoenix/Bear levels, then sure, it'd be worth grinding one's entire city to a dead stop, jumping through all the hoops & treating the game as a near full-time job for the next 20-something days.
But as it stands, this event is yet another pipping hot bowl of mediocre disappointment.