I wont lie. I do want to bring a bit of negativity here. Cause people suger coat devs like you, and it gives me diabetes. If a small kinda incoherent dev team (as in from what people told me every one of them is only good in one field, and has no clue about other people fields, they don't have anyone with good management skills so they often wait one for another, etc.) tells you they care first for core players, you can basically read it as they care only about them.
Why do you take things out of context? The feature was a challenge troll, that would scale up with player levels, easy to implement (so dev lies that its time consuming), we even had a big (later deleted) conversation with ideas how to do it exactly. Something that would let people who want a challenge not one-shot kill enemies in PvP/story-trolls, something to spent battle energy on when you have all girls dropped and all of them upgraded.
Heck the challenge-troll idea came to life instantly after the same dev you quoted told me they will never fix difficulty in story.
But in that more than 1 hour of discussion, I got the feeling of them (him) being full of themselves (himself). My feeling after talking with Kaos is that he basically doesn't like people with a different opinions, and instead of maybe admitting they could do things better, try to suger-coat what they did as being a basement for future changes, to use his own words. I mean I am a bit full of myself too, which lets me spot another one similar to me easier ;P.
As a side note (cause we all love them lol): The biggest affection issue is its cost, how fast we can acquire gifts was an side issue that became important cause of the extreme cost in the first place. What this update did is band-aided the side issue, leaving main issue mostly untouched. I say mostly cause PvP free gift drops can help a bit, but how it helps is more or less static, thus it gets less and less helpful with rising cost.
I don't know any other game where the more characters you have, the harder it is to upgrade them. The idea itself seems stupid. But then we don't really use more than 3 characters in HH. So one could argue that the "default" ideas about character collecting games shouldn't apply to HH.
In conclusion: I am full of myself to a certain degree. But so are the devs or at least Koas himself. They made a big change, that made a lot of people angry, told us those changes were required for game future and that they will roll a fix to biggest flaw, asked us to wait a long time for it, and then rolled an update that more or less doesn't really fix the issue at hand. This makes some of those angry people, be even angrier to the point some will leave.
Personally I will wait for PvP update. It will let me confirm how full of shit or not devs are (as in were the 2.0 changes really necessary for future updates). And then quit or not game depending on the update/game state/future.
Around 70th girl requires around 15k affection points. Which is 6.2 millions cash. Plus nearly 2 millions for upgrades themselves. You can get probably at most 120k cash/h if you work on your harem collecting. You can't even do 15k cash/h from event trolls. You would need to play like 16+ hours a day to be able to level one girl to 3* in less than 3 days. I wont say its impossible, but for most people thou that time will be far, far longer.
Just a small side note ;]