However, I think power creep came into play with the firestarters. They have more hard points, better geometry (or at least apparently more forgiving), essentially the same top speed as the Jenner (the difference between 295 and 300 is negligible in practice), and in many cases better quirks. The SRM4 quirks on the JR7-D are laughable since its primary weapon is usually medium lasers. The quirks on the other Jenners are similar.
Compare:
FS9-H (ML heat generation -7.5%) (Energy Heat generation -7.5%) (Energy Range 10%)
6E and 2B
JR7-F (Energy Range +7.5%)
6E
FS9-H has far better quirks, better hit boxes, two extra ballistic hard points, essentially same top speed ... why would you ever take the Jenner in that situation?
Compare:
FS9-S (Medium Pulse laser heat generation -15%) (Energy heat generation -15%)
7E 2AMS
JR7-K (Medium pulse laser cool down -7.5%) (Energy cooldown -7.5%) (Energy heat generation -10%)
4E 1M
Light mechs always have trouble with heat since energy weapons are often the basis for their firepower. A 30% heat reduction on MPL is huge compared to a 10% plus 15% cooldown ... the JR7-K will not be able to fire lasers as often without overheating. Plus if you fit the mech with anything but MPL ... the FS9-H still gets 15% heat reduction across the board AND it can equip 2 AMS if you are so inclined.
If you want a reason for the dearth of Jenners on the field ... I think it can mostly be attributed to the fact that PGI generally made Firestarters strictly better in terms of hard points and hit boxes AND further exacerbated this by giving them better quirks.
P.S. Just as a reference point ... I have mastered 3 Jenners and 2 of the Firestarters so far

Edited by Mawai, 03 April 2015 - 04:13 AM.