It will be one Hotspot style for each type of hotspot with a custom graphic.
You surely don't use hundreds of different custom hotspot graphics in a single tour?
Not very helpful.
What I as trying to communicate was that, say, you have a custom graphic associated with hotspots that link to web sites. You don't need a separate hotspot style for each instance, you just need one for all instances.
I understand that you don't miss this feature from v1.8. Nevertheless, I do.
I just feel it's not so very different although the workflow is not the same.
In PTP 1.8 using the Hotspot Editor you place the hotspot, and then in the Hotspot properties panel you select the custom graphic you have created in advance.
In PTP 2.0 in the Style section you create the Hotspot styles for the project using the custom graphics you have created in advance, then in the Tour section's Hotspot editor you place your hotspot and associate it with the appropriate Hotspot style.