I'm one of those hated attorneys. And, in my experience, while there are issues that sometimes may seem to outsiders like pointless minutae that keep people from getting at the real issues, the rules of civil procedure (especially at the federal level) are designed to do exactly what you want: to facilitate getting to the core of the issue as fast as possible (of course, if the core of the issue is a factual question, this can take a while due to pesky things like discovery and jury trials). Without more detail, the problems you describe sound, with respect, like the complaints of someone who does not really understand how litigation works. Maybe if you could put a little meat on the bones I (and we) could understand your criticisms of the system a little better.

In this example, as you say, "there is a question as to whether this patent is valid or not, and whether it covers this particular issue or not." If the defendant thinks those are real issues, then one of the first things the rules would have you do is to file a motion to dismiss arguing exactly those points. If the judge agrees with you, the case is over and you go home. (Of course, there is the possibility that there are other claims that aren't subject to those arguments, or that the plaintiff could amend the complaint to add new legal theories, but that's another story.)

To the extent it is true that courts "completely front-load all these arcane minor points" this is usually true only to the extent that these arcane issues are actually dispositive.

EDIT: Try thinking about it this way: whether an issue is arcane, and not what a person might think is the "real" core of the issue, is sometimes orthogonal to whether that issue is dispositive. And there are usually good reasons for this--though reasons that may not be obvious to non-lawyers. This can, and should, result in courts spending what may seem to the untrained eye like too much time on arcane but dispositive issues in an attempt to resolve a case efficiently.