I'll admit I'm somewhat of a Metro nazi, so the problem for me of not getting a timer and other utility apps out of the box is that the design isn't perfectly Metro, and the apps aren't completely integrated (with Mango).
I'm all for Microsoft having these kind of apps available on the marketplace, but the problem is they don't even update them (the Weather app doesn't have a Live Tile), the performance is poor (check out the World Clock), the UI isn't intuitive or responsive enough (Unit Converter), and ironically, most of them aren't completely Metro (I think none have the usual transitions, at all). It almost looks like these apps were designed and programmed by some student interns before the release of WP, and were abandoned afterwards.
Another is that, sure, you could just download a Timer, Stopwatch of Weather app, but the regular user won't bother finding out if there's one by Microsoft (which isn't the best anyway), but will probably end up downloading a poor app. Two of the best stopwatches I've downloaded aren't top apps, and the rest are just poorly coded and designed.
My solution: either include all these utility apps on the system alongside the available ones (rename Alarms to Clock, and include Timer, Stopwatch, World Clock, etc.; Unit Converter inside Calculator; etc.), or have a section on the Marketplace called Essentials, and include all of them, designed and coded as if they were part of the system (i.e., perfect Metro apps).