Roll off is a parameter for DVB-T, guard interval as well.
Pilot - don't know. Perhaps something like tuner lock state.
Generally, such parameters and flags may also depend on the device used, as some may provide some flag signalling that others don't, or some parameters may be auto detected from one hardware / driver, on others a manual selection may be necessary. Like known from FEC on satellite. The Nexus, for example, provides full Auto-FEC over the driver, other tuners need to read that parameter from the transponder list.
With S2 modulation it may be quite similar.
Also possible, some DVB-S2 tuners still cannot be controlled on this modulation by ProgDVB, if they use an uncommon control for (de)modulation switching. Normally, FEC=9/10 should do the job, as that's always used for DVB-S2 AFAIK, but you can never know, what contro0l a manufacturer may use instead then...
Main problem, there's no general definition for satellite specific switches in BDA standards, like for DiSEqC, LNB voltage (including +1V option), skew, band switching or alike. Instead, as BDA was originally made for terrestrial, usually some options for that are interpreted differently, or even the drivers may be bypassed by proprietary tricks.
That's a common issue on most of the latest technologies (like W-LAN above 54 Mbit, for example), usually some general definitions are still missing for quite some time, always keeping up a draft state alive and continuously changing, causing many compatibility issues for customers and programmers as well...
Watched similar issues for the first time around 1990, when some Korean TV manufacturers tried to implement analogue satellite with normal TV concepts, trying to control audio IF by mis-using NTSC hue control voltage, stereo / A / B audio flags for audio bandwidth and deemphasis.
Crippled HiTech to avoid costs for new system controller programming
As ProgDVB tries to control most of the existing DVB devices at the same time, there is always a chance to run into compatibility issues for some options. I am sure, Prog does the best he can, but if lacking manufacturer support in many cases, it's pretty hard for him, to find a good solution for all hardware on the market.
As I don't have any of those DVB-S2 devices here, that's all I can tell for now.