Hi Alex,
no, there is actually no way to use it with a popup at the moment. Popups generally caused more trouble in the past and are more or less a relic of the 90ies. Not all share services fit into the same window size, a lot of people use ad blockers nowadays and/or have popups disabled completely. Not even starting with the use on all the different mobile devices forcing you to use whole JavaScript libraries just to open it correctly on all devices. All the while popups are an accessibility nightmare. Long story short: Not worth the time and effort. We might add an option for it in a future release (including a decent warning that you might block out people from using the buttons), but the default behavior will stay as it is.
Regarding your suggestion:
And one more suggestion, would be good to have an option to counter with 1 and more shares.
I probably did not understand it correctly. Could you elaborate a bit more what your suggestion is? Did you mean to only show share counts, if you have at least one share? (-> hiding it, if it is zero)
Cheers,
JP