I personally think that 14 days is already too long; 10 would be about right for my gameplay, I can keep 6 builders busy easily in that timeframe. I would hate to see anything beyond that become the norm. Having said that, if they choose to increase the time to build or ug, it won't be enough for me to quit. It will be something I complain about, though.
Someone else may have another idea, but that's how I'd do it™
TH12 | Divine Justice | Clan Level 19 | GG 2B+ | EE 2B+ | HH 22m
Lvl 65 AQ | Lvl 65 BK | Lvl 40 GW
Contact SC here. Click here to see how trophies are calculated. Click here for answer on how cc troops deploy (hint, it depends) and more info here. How is war map placement of max halls determined you ask, check out threads like this one. Thank you SC for the new legends! I'd start it at 5500 and let farmers play 5000-5500, but overall it is a great improvement.
My initial reaction to the 18 days is that it was just the dev build. I'm currently expecting it to be reduced to 14 days. My reasoning is that most, if not all, buildings that have had a 14 day upgrade that got new levels, the new level was 14 days and the lower levels were usually reduced. I also seem to recall a long time ago the idea that 14 days was the longest upgrade time and wanting to keep to that.
Now if they changed ideas and going forward we will have longer upgrade times that'll be ok as it'll be the same for everyone. Longer upgrades just means more time to store up resources when farming or more time in between upgrades to work on walls. We also have the gold pass builder boost and magic items that will reduce the overall time needed for all upgrades so it'll likely balance out in the end.
Not sure what audience they are going for but after 18 days the average person has moved on. I suspect this is just for the developer build and that everything will be reduced. If not then I think it is a horrible mistake and will put a lot of people off, me included.
Two week upgrades are a stretch, upgrades bordering 3 weeks is completely ridiculous. When i see people say if such and such isn't changed ill leave forever etc etc its like yeah your still be here playing next week, but i believe this when people say they wouldnt stick around, thats a seriously long time to keep a player disengaged