Bevilacqua has not been part of the JSF program for some years and most of the graphical material included in that presentation is old. Note that the video shows the pre-2004 split-top fan doors.
Below, Navy engineers from 2010.
For landing, VL (or VTOL) pads will be used. This pads will be exposed to 1700ºF and high velocity (Mach #1) exhaust. This exhaust will melt the top surface of asphalt pavements, and is likely to spall the surface of standard airfield concrete pavements on the first VL.
Therefore high heat resistant materials are required for the pavement and for the joint sealants. At the present time there are no identified sealants that can survive a significant number of VLs, and the pads shall be constructed
using continuously reinforced concrete (CRC)... with continuous reinforcement in both directions to insure that all cracks and
joints remain closed.
High heat resistant materials for the pavement have been identified but are still being tested.
http://www.wbdg.org/ccb/NAVFAC/INTCRIT/fy10_01.pdf
Those specs still appear to be current, the main change having been that a suitable concrete has been selected. This is from last September, almost three years after the LockMart spokesmen and USMC commander were assuring everyone that the ground environment was Harrier-like:
Navy prepares more contracts for work related to F-35 | Beaufort News | The Island Packet
Made from an advanced, high-temperature concrete that can withstand the heat from the new jets' engines, the surface will be used by pilots to practice taking off from and landing on the deck of an aircraft carrier using the plane's short takeoff and vertical-landing capabilities.
Maybe "creeping vertical" can alleviate some of these effects. However, I'm not aware of any schedule for testing F-35B on low-quality surfaces, nor is it a KPP to my knowledge.
Also, as for "asphalt" and "concrete" we should not get tied up in terminology:
https://en.wikipedia.org/wiki/Asphalt_concrete
AM-2, by the way, is not solid so it will have a heat-shield effect on either standard or asphalt concrete. The JSF's ability to land on an unprotected surface has nothing to do with AM-2-shielded demos.