Well, being Western centric at least makes some sense in the late game (less so in the early-mid game), historically. From a playability stand-point, it is a Western game for (primarily) Western consumption....of course it is Euro-centric. If it wasn't, people would not identify with it and probably would not play it (unfortunate, but true.....we like what we know).
Way I see it, there are four main infantry units from the mid-1800s to now....a space of 150-odd years. It's too many, in my book. Spread them out.
I get that. I'm merely saying that people focusing solely on the Western time period when Great War Infantry and Infantry were introduced kind of defeats the point of having a game where you command history. It also leads to situations where people get upset because a unit may turn up outside of it's 'historical' (from a strictly Western perspective) context, which is a bit silly. That's all I meant on the subject.
I've already mentioned the marketing aspect and we completely agree on that.
I also wasn't trying to argue that weren't too many units (though I disagree on the assertion that there are, but this is largely an opinion issue so I'm not arguing that point - just stating my opinion).
U seem to fail to grasp that paratroopers and marines is optional. If you need them, you will build them. If you don't, you don't. There have been times where marines and paratroopers was simply way more useful than mech infantries.
Sometimes, there's simply just badlands where they excel at.
And on defense, paratroopers can even do even more tricks that mech infantry simply can't do like bypassing enemy lines in your territory. I seriously disrupted one of chinese invasions by judicious use of paratroopers to penetrate the invasion forces with ww2 infantry tanking the charge. And the fact that you can't just simply road each single hex increases the value on paratroopers in fact. They can move further and quicker than mech infantry does, and bypass mountain ranges. Or even provide quick chain of island defense lines.
Tons of small islands but japan couldn't invade them so easily due to me keeping paratroopers in the area. They was forced to do too much amphibious assaults. Which in turn, bled them too much for them to even actually take cities on smaller islands nevermind the fact that they ran out of forces to even push on and take the main island in a island chain.
I think this was directed to me, but I'll take a whack at it in any case.
Units like marines and paratroopers
are optional. The problem is, the situations where their obvious benefits are really useful are also usually situations where I can get by just as well with other 'mainline' units. Their abilities are not so well-developed that there are many situations where I could do
much better with them. I'm not saying they don't happen, but it's rare. I guess what I really want is more well-developed/stronger unique abilities for units like this. Lacking such, I don't use them because as I stated, I get by just as fine without them.
There's also the opportunity cost of building them. Sure I could build a marine to take a coastal city. But then I've taken it and the marine is largely redundant. I could have built a more powerful, more general-purpose unit like a tank or bomber instead. I don't knock the concept of marines, paratroopers, etc.; rather I knock the execution.
BTW - I am pretty sure that Paratroopers can only paradrop when they start off inside your own territory. Which means they aren't quite as mobile as you posit - though I can't remember if they can use enemy roads or not which would offset the limited paradrop somewhat, but not completely. The limited paradrop, coupled with a relatively small drop raiuus and the lack of drop-then-attack in one turn really offsets the paradrop and turns what could be an awesome unit into something that's really meh and highly situational.
BTW again - People have tried to argue how useful paratroopers are by pointing out their own strategies in other threads. These strategies often included massive aerial bombardment and/or the use of nuclear weapons. Any 'optional' unit that requires the extensive use of other units or nuclear weapons is pretty meh in my opinion.