If you confine yourself to makeshift Western versions of Buddhism you will not get a realistic view of the Dharma. I'm not suggesting that one should dress up in Tibetan robes and so forth, but I do believe that some exposure to ethic Buddhism is essential.
I agree to an extent, especially because it will offer an alternative to beliefs and worldviews which one was inevitably brought up with as default by virtue of being born and raised in a western country (like materialism), but then such influences also permeate Buddhist traditions around Asia.
Tibetan Buddhism is so potent in one respect: it never went through the process of "Buddhist Modernism" like Japan and the rest of the Buddhist world did. Most of the premodern values and perspectives are still there and were not erased or reformed in favour of contemporary western ideas. It wasn't really exposed to protestantism and Catholic ideas either.
Here in Taiwan I see a lot of subtle and obvious influences from Catholicism actually. The power structures were recreated in emulation of the Church for example. There's also a lot of capitalist ideas that have been absorbed. A lot of what goes for Buddhism now around much of Asia actually wouldn't have been accepted a century ago. There's been a lot of reform and westernization. A lot less so with Tibetan Buddhism.
Ideally, you should completely immerse yourself in Asian Buddhist culture over the course of many years until you have totally absorbed it, which is not at all easy, and then step back into your Western shoes again. You will see that in many respects Asian Buddhist culture is defective, and that modern Western culture is often much more advanced, but you will not be able to change anything or produce a workable hybrid. Instead you will just have to maintain an awkward internal balancing act. It is not 'completely satisfactory' but until such time as a Western form of Buddhism develops naturally, it is the best option.
Interesting idea. For most people of course this isn't viable. If you're anthropologically minded, it can be interesting and rewarding to participate in a whole other culture as an outsider and observe how things work from within, though I don't think many people want to do this.
One admirable feature that many western Buddhist organizations have is democracy and transparency. The decision making processes are decided by members. Even if you're a new guy you have a voice and the right to be heard out as much as the senior members. You also have the right to disagree and voice disapproval (it might not be appreciated, but it is your right nevertheless). This does not really exist in most of Asia. Usually the upper echelons of clergy decide things and everyone is expected to fold their hands and follow along.
In terms of management this has some advantages, but the huge disadvantage is a lack of perspective and planning from the actual ground level. The lowly people are unlikely to have their issues really appreciated. So in a religious organization you might end up with senior administrators with grand ideas that don't reflect what the common people really want or need, and so things decline and nobody understands why.
In a democratic model where the young and old both have equal voice and feel comfortable expressing and promoting their own ideas, an organization will be directed by collective concerns rather the vision of a few people who might be divorced from the reality most of the membership face.
Actually this is probably the greatest problem facing Buddhist organizations around Asia. Elderly clergy who have no idea what younger generations are thinking and doing. They might let a youth group have their own activities, but that's not letting them actively participate in the decision making process (in many places I imagine they would think twenty something year old kids are too inexperienced and immature to be trusted with such responsibilities).
Nevertheless, I believe if youth were given power and a voice in decision making processes, then organizations could address the needs and concerns of younger generations and not fall into decline.