First of all, PR does not necessarily NEED the OLD mode, but in my opinion it really needs some kind of training mode (which is explicitly intented to serve that purpose). For some reason I have come to think that attempting to do some realistic experience game while not maintaining some kind of training environment...just doesn't click. Reportedly, there is a hell of a work going on to ensure training scenarios and experiences for the military are as realistic as possible. Transferring that intention to PR, this seems to involve getting in touch with real people. Lots of them. Just as in live rounds on PR. (Yeah, I know. A bunch of them was just doing ****. Which nearly almost made us find the perfect countermeasure

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Secondly I gotta admit that while practising is definitely possible with local servers and stuff, it isn't nearly half as fun as it was when I just im'ed a friend of mine to hop on the famous battleforce server and within an instant we were practising and having fun together without much of an infrastructure overhead incurring with setting up our own server and configuring nat rules etc. etc..
Furthermore, I met a number of cool players in training and it provided us with a lot of joy to meet somewhere "in the field" someday. It may sound weird to all the hardcore reality experience guys out there, but we had a lot of fun on training servers, too. One might say that we were rather playing in a sandbox from time to time. We had fun building firebases in the nowhere, defending it in 3 vs 3 until the enemies got their laser set up for some intense smashing from the clouds

. Believe it or not, on a number of occasions some friends and I were introducing total newbs we met on the server to the mod and it was fun hopping through vehicles, scenarios and operations just to make sure they knew the basics, enjoyed the mod and got the basics for their first battle round on muttrah city or something
No, that's not the military training a bunch of you guys would like to see. But it added up to PR's value. Why? Because of the word I used most in this posting: Fun. (Yeah, once again a few hardcore reality lovers possibly won't like me mentioning "fun" and "reality" in the same sentence

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Finally, I would like to mention one of the first and one of the most spectacular events I remember about PR: The moment I encountered some kind of text in the manual saying that I gotta go practice on a TRAINING SERVER before going live. Hell! The first game, mod, whatever to actually care about training! Those guys are doing a serious job!
Since a while now, there is nothing like dedicated training. From a product point of view...well, poor PR!
Good night, best wishes and all the best
Bunny