From my point of view, Philosophy and spirituality in the martial arts are two separate subjects, yet intertwined.
Philosophy in the martial arts can range from 'new age spirituality' to 'let's just crack your skull' philosophy. both are philosophies to the arts.
Spirituality incorporates philosophy but typically is an attempt to explain the 'why' we are on earth question and 'what happens to us when we die' question. At times spirituality implies religious beliefs...I don't believe the dojo is a place for this unless you go to that dojo for that belief. (I am a Zen Buddhist and incorporate many Zen concepts in my training...but you don't need to be a buddhist to practice with me...but many of my students study for the Zen practice)
My martial art is about 'if you touch me...I hurt you philosophy' but wrapped in the nonviolent zen teachings. yes, a paradox, but that's zen for you.
Both can be used and misused, dependent on your philosophy or spirituality. So, to be long winded I do feel all martial arts already have philosophy, but don't necessarily need to have spirituality. If you stress a spirituality in your martial arts you should be upfront about it. Some people like it, others don't. There is room for all types of martial art studios.