I did some maths, it can be found here:
http://www.mediafire.com/?ye14empwq12eqw5Contains one .ods Spreadsheet (ain't got no money for MS Excel) - feel free to mess around with the values in the "Input" part.
Also contains one .pdf with one example from the .ods file.
Basically what I "found out", at the current RP income and ingame store pricings:
If you play
5 matches a day, which will take between 1 and 3 hours a day, you will make between 700 and 1700 RP per day.
That equals between 20k to 50k RP per month, provided you play every day.
This in turn means that it will take between 3 to 7 days of playing to unlock, i.e. buy a Tier 1 weapon. At this point, you have not bought any armor inserts, no grenades, and no attachments for your new weapon.
To buy and equip (i.e. add attachments) a Tier 7, formerly lvl30 weapon, at this pacing, you have to play between 30 and 70 days. Still no inserts, no grenades. Also, no armor/device/handgun upgrades, and no new weapons for any other class.
If you have no social life outside GR:O, don't eat, barely sleep and play
20 matches a day, thus spending between 4 and 12 hours each day playing, you will earn between 2.5k and 6.25k RP on that day. Do that for a month (if you survive) you will have made between 67k and 190k RP.
To unlock and outfit a lvl30 weapon, you will still need between 9 and 24 days, depending on your actual RP income.
However -
due to the new Tier system, this will add up for each tier - so, to
unlock tier 7, even if
all your matches earn you 500 RP each (which they won't), at 10 matches per day (which is 2 to 6 hours) you will still need 40 days. At 100 to 300 RP per match (more realistic), that's an average of 116 days of grinding. At only 7 matches each day (instead of 10), 155 days average (maths says between 90 and 220 days).
So, conclusion.
An average income of 1200ish RP per day sounds like sh!t at first glimpse.
So does the fact that you need 5 days of playing to unlock your first non-GI weapon - for one class.
But, on the other hand, it will "only" take 200 days (average value) to hit levelcap, i.e. Tier 7 (for one class).
What I think is amiss here is that it will only take 20-30 days to get to lvl 30 - while being "stuck" at tier 3.
So yeah. An income increase is necessary, but not as drastic as one would first think.
And the levelling system needs to be matched (at least a bit) to the tiering progress - or removed altogether.
PS. also posting this on the official forum.