All this has happened before, and all of it will happen again.
The differences largely come in terms of the different crafting rates which have been used to provide better comparitive rates for higher professions
Shotgun shell - Level 0
Before wipe $1400 for 100 @ $3000 an hour = 214.3 crafted an hour
After the wipe $480 for 50 @ $2000 an hour = 208.3 crafted an hour
~97.2%
10mm JHP - Level 0
Before wipe $1000 for 100 @ $3000 an hour = 300 crafted an hour
After wipe $480 for 50 @ $2000 an hour = 208.3 crafted an hour
~70%
10mm AP - Level 1
Before wipe $1200 for 100 @ $3300 an hour = 275 crafted an hour
After wipe $600 for 50 @ $3000 an hour = 250 crafted an hour
~91%
(Side note, 10mm ammo was kept higher because p90c was such amazing value before the wipe)
.45 Cal - Level 1
Before the wipe $1300 for 100 @ $3300 an hour = 253.8 crafter an hour
After the wipe $300 for 50 @ $3000 an hour = 500 an hour
~197%
(Significant boost to .45 cal ammo because the guns are uninspiring ... they are now at least cheap)
5mm JHP - Level 1
Before wipe $1200 for 100 @ $3300 an hour = 275 crafted an hour
After wipe $350 for 50 @ $3000 an hour = 428.6 crafted an hour
~156%
5mm AP - Level 2
Before wipe $1400 for 100 @ $3600 an hour = 257.1 crafted an hour
After wipe $885 for 100 @ $4000 an hour = 452 crafted an hour
~176%
(Minigunners!)
.223 FMH - Level 2
Before wipe $1800 for 100 @ $3600 an hour = 200 an hour
After wipe $1445 for 100 @ $4000 an hour = 276.8 an hour
~138.4%
Flame fuel - Level 0
Before wipe $900 for 20 @ $3000 an hour = 66.7 an hour
After the wipe $120 for 10 @ $2000 an hour = 166.7 an hour
~249.9%
Flame fuel II - Level 2 was 3
Before the wipe $2000 for 20 @ $3900 an hour = 39 an hour
After the wipe $990 for 40 @ $4000 an hour = 161.6 an hour
~414.4%
Explosive Rockets - Level 1 was 2
Before the wipe $2000 for 10 @ $3600 an hour = 18 an hour
After the wipe $300 for 1 @ $3000 an hour = 10 an hour
~55%
(Please notice the decrease in profession levels, if it had stayed the same it would hqave been 75% of old crafting time)
AP Rockets - Level 3
Before the wipe $3000 for 10 @ $3900 an hour = 13 an hour
After the wipe $2000 for 5 @ $5000 an hour = 12.5 an hour
~96.2%
In conclusion, most times either stayed virtually the same (lower levels) or got a lot faster (higher levels) - with the exception of explosive rockets, which went lower a level and recieved a price increase and 10mm jhp which can be lethal in the SMGs, but also need to be low level, so suffer from a decrease in crafting time but having to remain quite pricey due to their unique low/high tech level weapons.
Also note just how much BG ammo was decreased outside of the explosive rocket and the AP Rocket staying the same price.