This is a key requirement for me. I've noted that many people considering MBAs - especially those with experience and later in their career - are unable to commit to large periods of attendance. The optional nature of these seminars/modules means that it is possible to enjoy a pseudo-cohort and enjoy some networking opportunities without getting stressed out.
I have just been talking to someone on a top tier EMBA that was told missing a module is not acceptable for work reasons and would result in you having to delay graduation for a year while you took the module the following year.
For me the key advantage of a "flexible-EMBA" or a "Distance-Learning MBA with optional attendance" is that flexibility.
As one gets older and more experienced: the responsibilities, domestic commitments and lost salary increase and so attendance on modules must be selective for maximum ROI.
My ideal would be a flexible EMBA, clearly aimed at managers aged 35+ where maybe 50% of the modules must be attended. The cost of such a course (as long as it represents good value re the university) is not the most significant factor, so I am not proposing a cut-price option. If it is planned well then benefits from being part of a cohort may accrue.
BigD
Durham and Warwick seem to allow the students to switch modes and mix-n-match DL and on-site modules. Allowing DL students to take on-site moudles with FT/Exec classes. Allowing DL students to take part/ join International trips/assignments with other mode students. These are clear indication that DL programme is treated on par.