Are you sure you've read right on the ram-speed?
I'd switch that out for faster ram, your motherboard supports up to 3600Mhz, 2800 or 3200 should be fine at 16gb.
I'd also upgrade the ssd for your system-disc. A 500gb system ssd would improve user-experience quite a bit I believe.
That said, for 1500 euros or pounds you should get a quite decent desktop if you want to just upgrade it.
As an example of what I see on Norwegian sites (mind our prices might be a bit high, and I'm even talking pre-built here) that you can get for around that price:
3 year warranty
ASUS ROG STRIX B450-F motherboard
AMD Ryzen 5 2600X (6 cores, 12 threads, 3,6GHz)
GeForce 2070 (
increase % of 35% over 1070)
16GB 2666MHz ram
500GB M.2 SSD
2TB HDD (not included in the package, but you can add the drive yourself within the price-range)
You should consider how much money you really want to spend right now. Truth be told doing minor or no upgrades for a little while could be the better solution as AMD might start pushing even harder to take on Nvidia & Intel in the coming year or two, but on paper you get a lot of upgrade for the cash on hand, especially if you manage to get a decent price for your current rig.