I use my Giant Revolt (2015) for winter commuting but I have enjoyed riding it around Forest of Dean trails and bridleways from time to time. I reckon I do about 1500 miles a year on the roads on it.
It came with 700x35 Schwalbe Smart Sams which roll quite well and give a soft compliant ride over bad road surfaces, and bomb along trails very nicely/confidently. On a 10 mile road commute I reckon on doing 16 mph, whereas with my TCR I might only do 1 or 2 mph more. Switching to 700-32 tyres doesn't make much difference to weight or speed and the bike's less comfortable/versatile.
It is a bit of a tank & I do notice the extra weight compared to my TCR carbon bike as you might expect. I have yet to use it on anything longer than about 25 miles as I think it would be more tiring than the lighter bike.
On family holidays, it has been up & down the Kirkstone Pass a few times and also descended and climbed the Pena Cabarga !
I think a lighter 10kg gravel bike would be great for majority all-year road use. Mine is about 12.5kg. If you're not doing longer rides then a heavier bike is fine.
If buying again I would look for thru-axles and at least TRP Spyres if not hydro disc brakes.
