It seems to me that many Austrians over extend themselves and devote their talents to fields that may, perhaps, be better covered by others.
Take Hoppe for example: he’s written on money and banking, ethics, social and political philosophy, epistemology, political economy, the socialist calculation debate, sociology and history.
Or for another more extreme example, Rothbard wrote on money and banking, history, economic history, ethics, political philosophy, epistemology, sociology, the socialist calculation debate, political economy, capital theory. This is in addition to writing a major treatise on economics and huge amounts of popular writings.
Whilst Mises and Hayek also did this (indeed, the latter wrote on an even great number of subjects), they were both system builders confronted with little other choice. Mises built a system of praxeology and had to confront the epistemological issues concerned with economics whilst developing the actual system of economics. In spite of this Mises devoted relatively little time to issues of political philosophy (Liberalism) and even less time to ethics.
Now, to put things in perspective, I’m a big believer that Austrians should confront the mainstream and do their best to put their ideas forward to the mainstream. Whilst it might be an uphill battle, it’s one well worth fighting. If Austrians are wrong then they’ll be shown that an economic science will progress, if they are correct their ideas will win out in the long run. And if the situation is somewhere in between (which it is) then Austrians will learn from neoclassicals and vice versa. Recently I’ve been critical of Boettke, however, now I see that he is indeed correct. Austrians take their correctness on faith, the only way to adequately test the Austrian system is to prevent it to the profession and defend it against their critiques.
This isn’t to say that Austrians shouldn’t attempt other strategies (agorism, for example), but that such strategies are merely political opportunism and nothing else. I find a lot of people on these boards have something of an anti-intellectual streak (as seen in the Sterba Libertarian Critique topic).
As such, if Austrians truly do wish to progress then specialization will, no doubt, be important, and overstretching (for lack of a better word) will only hinder the development of Austrian economics.