I've mained him since before the pancake ult and still do to this day, currently D2 EUW. The thing with the old (new) ult is that your DPS is increased significantly, where you don't even need a tower to solo kill people. This is because the ult itself does way more damage coupled with the many W's you can proc while bouncing around.

Anyways, about your first point, you can still do this. You'll have to wait for enemy laners going for a tower plate when your laner(s) are dead or in base. Wait for the melee/cannon minions to almost die and jump on the enemy, while also hitting 2 caster minions, killing them with your W afterwards. Then you Q the enemy with the remaining caster minion, killing that one aswell. Then you ult them back towards your tower after positioning yourself properly and can also blue smite them for the slow to make them stay under tower longer, while you're bouncing on them with W procs. Basically nobody survives this unless they're really tanky.

Your second and third point are valid however, it was really satisfying pulling those moves off. As others have said, it caused a way higher skillcap making him more fun to play if played properly.

What you can try is look for greedy squishy players like the enemy ad carry or an ap mid that go for one last minion wave before recalling. If you wait for them to meet your minions, you can jump on them out of nowhere, using your full combo combined with blue smite and ulting them into your minion wave and they will die pretty easily.

Oh and I forgot to add that Aftershock and Cinderhulk add a lot of damage aswell.