ACTING as an SIC and LOGGING SIC time are two different things and you do not necessarily need to be the SIC to log SIC time. Much like how you can log PIC time in a complex airplane without a complex endorsement when receiving training toward the endorsement with a CFI. You are not legally allowed to ACT as the PIC however, you ARE allowed to LOG PIC time.

I quoted the EXACT words from 14 CFR 61.51(f)(2) that state it doesn't matter if you NEED an SIC to fly the plane or not. Since the OP is not able to log PIC time (no HP end), he may choose to log SIC time instead and if he does, all that matters is if the OP ..."Holds the appropriate category, class, and instrument rating (if an instrument rating is required for the flight) for the aircraft being flown, and more than one pilot is required under the type certification of the aircraft or the regulations under which the flight is being conducted." 14 CFR 61.51(f)(2) Since he does meet both of those aspects, he may log SIC time. Again, you are NOT the SIC and you are NOT ACTING as an SIC AT ALL, you are simply acting as a safety pilot and logging SIC time instead of the normal PIC time that you would be allowed if you were able to act as PIC.

I know this practice may not sound proper and airline interviewers may question your SIC time in a Baron but if you read the rule quoted above, it is pretty much clear whether it is allowed or not. Explaining the situation and why you logged it the way you did to the interviewer should suffice.

Now, your referenced FAA interpretation about not logging XC time or the Taxi/TO/and LDG, that is totally understandable and proper because once you stop flying under the hood, you are no longer required to be there thus, no logging time.