The main problem I have with Foundation courses is the cost - usually more expensive than the 3 yr degree course, and as you say no loan etc. When my DD applied we decided that they wouldn't be an option for that reason - we just couldn't have afforded it. She was also worried about the standard of the Foundation courses, though you should be safe with RADA

. In the end my Dd did a gap year rather than a Foundation courses - earning much needed money while still building her skills etc - and that worked out for us.
Good luck with the rest of the auditions - I remember them well, such a stressful time.
When is your DDS Central audition? Feel free tp PM me if you want any info in that regard.
The highway's jammed with broken heroes on a last chance power drive.