Fixing the storage layout takes not more than 1 or 2 hours, even for not so technically inclined people. Just follow these steps:
- Install Titanium Backup,
- backup your data and apps to an external SD card
- do the storage upgrade through your Fairphone updater app
- Restore your apps and data.
I think that the Fairphone 2 is not a high end phone, it just features more durable components. If you take Fairphone 1, with lesser quality components for 325€ and assume a lifetime of 3 years, it makes the same amount of money per year compared to a high quality Fairphone 2 which should last for 5 years.