My 3011 can carry a 2 meter Krone disk mower, without conditioner.
I do have some problems at high speed mowing, when the mower hits some mole heaps, it pulls the tractor aside.
A 3011 will work great with a 1.65 or 1.85 meter drum mower, which are cheap to find: the 1.35 models are much more sought after for hobby farmers and MF 35's and Fordson Dexta's, so there is a "low spot" in mower resale value, from 1.65 to 2 meter, at 2.40 they are beginning to cost more.
But if you just use a pasture topper which aligns behind the tractor, a 3011 will have plenty of power, i use mine with my neighbours 2.75 meter pasture topper. The tractor does it with ease, when the 3011 starts to grunt, you smell burning topper V-belts...
My brothers 2011 will also carry that topper ( just barely) but i think the 2 cylinder models were never sold in the UK ??
The 3011 is up to all tasks you describe. and if you want to load muck, use a rear end loader or a small 3pt backhoe. Front loaders will ruin tractors of this size.
A 3011 will do anything you want. Its comparable to a Dexta or MF 35, only they are more reliable,
fuel efficient and start better because they are direct injection, they have 10 instead of 6 gears, better hydraulics and parts are probably cheaper.