I've never used the quick templates and I don't play PF; I'm merely expressing what their intent was.
Ah. So you're talking about things you don't actually know about. Right.
That's all well and good, and others above expressed similar sentiments, but if you start planning too much character and plot, you run the risk of railroading the PCs, and not having it be truly a game or truly interactive.
So don't prepare them then and spend your extra free time down the pub.
Which is why I don't understand when people complain about prep time. I don't spend a ton of time prepping, because I think too much prep detracts from the session itself. If you don't want to prep, prep less. Simple as that. No edition makes any difference in this regard.
And here you have been told by many, many people with experience DMing both 3.x and 4e that you are completely wrong. The edition that makes the biggest difference is 3.X because you are meant to spend as much time on most statblocks as you would on a PC of that level.
And here's my problem. If I buy a monster manual, I'm paying for someone else to make a bunch of kobold shamans and quickblades that are useless to me.
Now I see the problem. You think everyone can and must prepare as you do right now when you have no experience of what you use as examples.
That's certainly a valid opinion. However, 4e monster design is also one of the major reasons why we are where we are (4e being abandoned for this new edition after an unprecedented short run,
Um... no. The abandoned edition after an unprecidentedly short run was
3.0. That lasted three years before it was replaced by an
incompatable game where they went far enough to change the shape of a horse. There are greater differences IMO between 3.0 and 3.5 than between 1e and 2e.
Meanwhile 4e is still having material published for it - and much of the crunch in the most recent book is compatable with the PHB but not usable with only Essentials. So you can't claim Essentials is a new edition. Will 4e last longer than 3.5? I don't know. I expect so - just. I'm expecting a January 2014 release date for 5e for the 40th anniversary. Meaning 3.5 lasted from 2003 to 2008 and 4e will have lasted from 2008 to 2014. The longest run of any WoTC edition.
D&D losing the top spot in the market
If you publish next to nothing, that's what you get. Pathfinder took the top spot in part by publishing much more stuff - the 4e release rate has recently been anaemic. And Pathfinder publishers have IIRC gone on record saying that a lot of their customers do not currently play D&D.
It is obviously a positive for some people, but an absolute non-starter for many others, including myself. The 3.5 treatment of monsters as characters with HD, feats, and skills delivered in the same method as PCs, was one of the biggest meaningful steps forward (not just a change in tone or cleaning up an old mechanic) in D&D's entire history. The 4e treatment of monsters as not being full characters was a correspondingly big backwards step.
As a DM I find this assertion laughable. The 3.X treatment of monsters as PCs is the single biggest waste of time in the history of D&D. It sounded like a good idea at the time (like a lot of 3.X) but getting rid of it was just accepting that an experiment had failed.
They aren't really that different. The player plays one character. The DM plays all the other characters, and determines all the non-character-based events, and interprets the rules. He's just a really powerful player plus a referee. They really aren't that different, and the character creation process for either really isn't that different.
They aren't that different. Except that the DM needs to do hundreds of times more things, each of which should have about a hundredth of the spotlight. You do not
need that detail.
And, since generally no one knows how long a character is going to last or how much use it will see, there really isn't any difference in the time for creating a PC or another character (monster/NPC).

We can take a pretty good
guess. And it's not length that matters. It's screentime.