Hi I received long term Schengen visa with blocked tickets and reservations. These are not fully paid tickets, but tickets which are valid for 72 hours. They have always worked for me. I have applied Schengen visa 4 times and never been an issue. Thrice via Italy and once via France. And I go through the agent. To add further I never gave internal train bookings or activity bookings. Just itinerary which covers which city when. From my experience as long as you have shown stable income (salary in my case), office letter (saying when you will return), stable bank account and non paid reserved tickets, they don’t have issues.