And now please an example how much more you pay let's say for 180 slots like mentioned above 
As I mentioned in my post, the prices players were paying under 200 slots were almost free. Barely 1-2 diamond per day. Those prices were not updated in our first big Houses patch some years ago and it was something in our to-do list for a long time. For your 180 slots example we went from 1.7 diamonds to 12.7 diamonds per day.
I mean what we actively said was up to around 200-250 slots the price exploded even tho the price curve got smoother for more slots the initial cost got higher what is a problem for us to explain in better. So in order to make it as it was before the price begin would need to be adjusted so if 2000 now is new limit instead of 1000 curve needs to be adjusted I a way that the price from 200 slots now goes into a direction of what 500-800 slots would look like (just a example of what I would think would be accurate if you want people to use the system correctly without having to pay so much for lower slots )
The curve was already modified to be smother. What you propose can't be done. There is no way to compete in any new diamonds offer price if the original you are talking about was close to 0. This price was not normal and now it got fixed. That being said, we understand that for those with smaller houses/number of slots this can be a big change. For that reason (as I said also in my last post) we are creating new f2p ways to obtain House Energy so the need to pay diamonds can be reduced/removed. Please, be patient and wait for the next changes.
I am looking forward to those f2p ways we gonna see if it will work out,- I hope those will be introduced soon tho since its always a interessting experience to see how systems get changed and get more expensive while the f2p ways get introduced later at some point while the cost things are always there instantly 
Because basically what you said was lower slots had old cheap system we fixed that it was cheap LOL while we also lowered cost for more slots ( most likely only nice for 2-3 people that had that amount of deco but still nice change for those while not a nice change for majority of players because those 99% need to pay more than 10x the price from before like u said before 1 is now 12 uwu.
(You said that you dont want to scare players with big jumps but i consider that players get scared of houing way more if they see the higher price from the beginn,- before players got scared around 180-200 slots while having to pay 300-400 now this peak is here way earlier XD)
Also if plans are there to add f2p ways to get cost around zero as you say how cant it be directly implemented into housing for lower slots
Wouldnt hurt i guess but i understand that that would not fit in curve for some reason i mean the question that i have in my head is is house energy supposed to be expensive or not ? and further should it be expensive to keep decoration in place or not ? Since i guess more people would decorate house without the cost from housing energy and would buy more deko from shop in the next step but thats just my way of thinking i might be wrong here.
Or in other words why do we need to add new f2p ways to gain house energy because it got more expensive instead of jsut lowering cost of house energy while keeping prices for dekorations same since its decison of player how much and if they want to buy cheap/medium/expensive furniture ???
Because house energy cost needs to be paid from every player while its hard to interact with it as a player if you want to decorate while buying furniture and deko can be interacted with way easier.
In short:
Lower cost = more creativity and more players get encouraged to build beautiful houses
Higher cost = lower creatifity and lower players get encouraged to build houses because house energy for low amount of slots now is through the roof. W.W
RL example if you bought a 180 balls of ice cream for 180 euro and someone tells you that you would now need to pay 1800 euro because curve got fixed people wont be happy but at the same page you tell them BUT if you buy 600 ice cream balls the price will be way lower than it was before uwu
Some fun fact about my House i paied around 70-80k dias for my house if i remember correctly already because of furniture this is a lot and i even think it would make seense to lower prices in generell since i highly doubt that there are a lot of players that spend that much or want to spend that amount as i can see from rankings aswell and what should i say other than that that is around 240 slots of furniure 

Greetings Miraiyu 