It is a small issue that a small island is easier to develop than a province 10 times its size and with 5 times the arable land because only one specific example nation really suffers from that issue to the extent we are talking about, mainly because Norway's provinces are almost all mountains and large. Im not sure any other country really suffers from this (what has Hamburg got to do with it?). I also don't know what province size has to do with it, you cant give a province buffs to development cost due to how large it is on the map.
That small island is easier to develop than many provinces 10 times its size with 5 times more arable land. Those many provinces are spread out amongst many nations in the game. For you to characterize this as a single nation or single example is inaccurate.
As for what Hamburg has to do with it, think about it for awhile in context. Or don't, like I said, I feel no reason to convince you. I'll probably come around to this later.
I don't know why you assume I don't want the developer to fix it, If you read my posts (ie, have some context) I have already argued in favour of adjusting mountain province around the world to account for differences between say the Alps/Himalayas and Mountains near the coast/tropical mountains. That is exactly what Wiz seems to be about to do.
I never said you don't think it should be fixed, I never implied you didn't think it should be fixed, I'm not sure how you reached the conclusion that I was assuming anything other than the exact point I was quoting and disagreeing with. I'm not even sure how you read my post in that context and reach the conclusion that you've reached.
What I don't want is any rework of the terrain system, they should add coastal mountains (and maybe tropical mountains) and leave it at that, addressing the other development issues through other means.
That is exactly what they should do. Going backwards to where every province was a complicated mess of percentage terrains is not the way forwards and will not improve the game. There are a few examples of wrongly implemented terrain like in Norway or Peru, they should be fixed with terrain changes or modifiers, they were mountainous but they had other aspects that made them good to settle.
If you want them to develop a more indepth system of terrain management then come up with one, because they already removed the complicated terrain system they had.
That's nice, I disagree, you've provided no reason for me to share your belief and so I remain unconvinced. I believe that assigning a province a terrain type based on a majority of the terrain works fine for military engagements which could happen anywhere within the terrain.. I believe that assigning a province a terrain type for determining attrition is fine since armies are large, supply lines are long, and if you're there under hostile circumstances, you're probably not parked in a city with supplies coming in.
However, when it comes to placing people, when it comes to people choosing to live somewhere, they don't pick a random section of the province, they pick the best section of the province, the most livable land, the most productive highland, the flood plains between the stretches of desert, or the coastline.
It's an imperfect system, I don't have a solution to the problems, but I'm not going to pretend like its problems are minor, and I'm not going to keep placing bandaid after bandaid on provinces as people notice them and complain is superior to wider development of this new system based on new information. Now, instead I'm going to hope the developers move forward and come up with something better, even if that something better looks like what they once used.
Edit: So, while I was thinking about this I came up with a reasonably cheap solution. Every province has a city identified in its description. For a province like Hamburg that city is Hamburg, for most though it's either the largest city or the administrative center, for Akershus I'm pretty sure it's Oslo. When you move your trade port, you move it to that city. When you move your capital, you move it to that city.
So give each province two terrain indicators. One for the province at large, this one is used for any military activities and is simply the most prevalent terrain feature. Then give one for the province's largest city, this one is used for domestic calculations. Mountainous regions where 90% of the population lives on the coast, can still be considered mountainous when a hostile army marches in, but it gets treated like coastline when someone develops it.