First off, to everyone referencing the upcoming balance changes, did you LISTEN to what Russ actually said in the Town Hall or are you just repeating what someone else told you he said? To me it sounds like the second, not the first.
Balance will be looked at again based on an In House Value system based on the physical properties of the Mech, hit box locations, hit box sizes, hard point locations, hard point sizes, agility properties(twist amount/speed, turn speed, acel/decel) and then adding in the various weapons and other systems that complete a Mech, in other words an incredibly complex and far more complete BV than anything done in TT.
THAT system will be used to determine tiers and quirks. That's it boys and girls, they aren't redoing weapon balance in the way you keep referring to, they are rebalancing the MECHS via tier and quirks. Which is a good thing, as many of the OLD Tier 1 Mechs aren't even Tier 5 now and some of the old Tier 3s are now Tier 1, etc. But changing how weapons work, adding/removing hardpoints, no, that's not what Russ talked about at all, he was clear, Tiers and quirks will be changed based on the new inhouse BV system that we won't be given access too. Combined with the HSR fixes coming next week, this could well be a great thing, or it could be a horrible thing, it's PGI, I reserve the right to hold judgement until they get it all done because, well, it's PGI and we know they can totally screw it up.
Weapon balance, well, we'll see if they get around to redoing it, which they should once the HSR fixes are in place, which I've been saying all along as Paul went and mucked things up left and right without proper data...ugh...that'll mean a lot of changes I foresee, and many people will NOT be happy when that happens.
IIC Mechs, OP as shown currently, since we've been told, by Russ in the Town Hall, that they can swap engines, ES/FF/JJ, and so on, they are customizable EXACTLY like IS BattleMechs are, they just happen to use all Clan Tech. That's not guesswork or supposition, Russ told us this information. The IIC Mechs would be fine IF they hadn't inflated the hardpoints by twice or more, but that is exactly what PGI did, so we'll just have to wait and see. Personally, I find the Jenner extremely worrisome due to the extreme missile hardpoints it was given, that's just stupid, since the Clan SRMs are half the weight, you can literally fit 2x the SRMs weightwise AND they gave you the hardpoints to do it! Think an Oxide is annoying? Try an Oxide with 2x the SRMs and a Clan XL, so blowing HALF the Mech off doesn't stop it like it does with an Oxide..and it has JJ! The others, well, they have the POTENTIAL to be OP due the inflated hardpoints, but we'll just have to wait and see, since outside the Hunch, the Orion and Highlander really aren't considered viable as they stand as IS Mechs(I don't actually agree with that, but hey, I think the pilot is a very overlooked factor in Mech usefulness). I personally want them but as they stand on the IIC page right now, I would feel VERY dirty getting them, but Aleksandr drove an Orion and...*sigh*..yeah, I'll probably get them and live with the guilt. I only play IS in CW, so I'll only use them in PUGlandia, and I really don't feel bad about what I do there
As to the whole IS vs Clan balance thing, I'm on the record, and shall stay on it, as saying the game is currently at parity, it is not a given that Clan is an autowin or that IS is an autoloss. We see this in CW, which is the arena where we see Clan vs IS currently. 12 man pug last night as IS facing a 12 man SWoL Wolf unit, we stomped them. 12 man pug IS facing -MS- as Clan, WE were the stomped party(DAMN fun fight even so, I salute -MS-, no bs from them, no hazing, just really good fighting, honorable foes, and actually a pleasure to see them in action!), later on another IS PUG vs a Clan PUG, Clan got stomped. It's NOT the Mechs that are making the difference, it's the pilots and their teamwork or lack thereof that make the difference when it's Clan vs IS. That is parity folks, it's actually pretty damn good right now and there's NO NEED to muck it up.
That'll happen next week after the HSR fixes go in, or maybe it won't, we don't know because right now we actually have no clue how many shots hit/miss based on HSR issues, but we'll be finding out. For now, IS vs Clan, parity has actually been attained. Clans have some awesome Mechs, the Timby and Scrow are still top of the line, but they are NOT so OP that they automatically give a win to their pilots, and that's good.