I think if you are planning to acquire properties or land in the Philippines in the future, a natural born Filipino who acquired a foreign citizenship will have limitations.
Also, I think if you have kids that weren't born in the Philippines and you own land/properties in the Philippines as well, they can't inherit it unless they have dual citizenship. Anyway, here's an article about it. http://www.balita.ca/2012/01/30/rest...ution-of-land/
Interesting reading
I can't seem to find anything mentioning dual citizenship though, it only refers to those that have given up their Philippine citizenship
Not sure if the same rules apply to those with dual citizenship or not.