Captain reported the MCO Citrus 1 Departure puts them below the Class B airspace and into heavy GA traffic environment.

Narrative

I am a Part 121 Captain on a RNAV equipped twin turboprop aircraft. Recently our departure clearance has changed to the Citrus 1 Departure. This is a vectored departure with an assigned altitude of 2;000 feet. When taking off Runway 36R with ZZZ as our destination; we are assigned a 270 heading. We are kept at 2;000 feet for at least 10 miles in most cases (I am told because of a VFR corridor). This now forces us below the Class B airspace. Many times we are also vectored over Disney World at 2;000 feet. Eventually we are allowed to climb and then are given direct FSHUN waypoint.I was told that because of an agreement between MCO and the TRACON; we are not allowed to do any RNAV departures because we are a 'prop'. There is a FSHUN 2 RNAV departure that is for both jets and turboprops; according to the chart. I've even requested a higher initial altitude but that isn't allowed either. I was told by MCO clearance delivery that this is the safest option.How can this be safe? A Part 121 Air Carrier being held below Class B airspace at least 200 knots; so that GA aircraft can pass overhead on a VFR corridor in an extremely GA heavy area.