General queries

So I’ve got a 2014 tdi vrs with 106k miles , white with black pack and canton sound.

, I do about 7k miles per year, vast majority are motorway miles.

Ive owned it 7 years and serviced myself every year.

I changed the glow plugs at 102k

Clutch peddle sometimes goes spongy and only returns to half way point (once every couple of weeks) , I assume it’s slave cyclinder next to clutch? I have never changed the fluid and the level hasn’t gone down? It’s still on original clutch.

I am now also having to top up the coolant , likely about 1lr per year, again I assume it may be egr cooler leaking as no signs of contamination on oil filler cap, any other quick checks I could perform?

The water pump / timing belt was done at about 50k before I bought the car, is it due a new one.

Just wondering potential costs for new clutch / slave cyclinder? New water pump / timing belt?

I love the car, just wondering if it’s now time bite the bullet and get a newer car , possibly cupra Leon estate 150bhp , just wondering if it will compare?