Nah, I like the Thanatos.
The Thanny C can solo clan heavies... 'nough said, though from my calculations it seems to be missing a ton.
As for the Prime, consider this, it is both under-performing and over-performing.
It is under-performing because it was built off of DHS but does not have them.
It is over-performing because its heat management is amazingly good despite having less half the heat sink power it should, the CBT has 6 DHS, I'm not sure where that last ton went.
Consider if you gave it DHS... you could have 3 DHS and it would still outperform its current great heat management with 2 tons to spare.
Use that extra two to upgrade to an MRM30? Boom headshot?
Also consider the JJs take up 5! tons so there is always the option of removing those and freeing up tons of space.
The Gauss variants are only under-performing because those weapons are under-performing... not the Thanny's fault.
The thanny is just rock solid and I can't wait to pimp it out in Mechlab.
Well real question is how it performs on the field. Its true that prime has good heat compared to heat sinks it has. In its prime variant it has enticing combination of:
1 ERLBL
2 ERMBL
1 MPL
1 MRM20
c3,gecm,jj,5hs, 2 free, luxury apartment, xxl silhouette witch dwarfs an atlas, largest lt/rt hit-boxes ever (suicide pill not included). And all that with 75 tons.
I don't want/can't hate this enough. Its a c-bills milk factory. Buy it only if you are in love with your enemy. Just imagine
shooting insulting any mad cat variant with this. And one can get the all the goodies of jump-jetting after unloading all your weapons and not doing any damage, just for the amusement. Perhaps the enemy in madcat/novacats/lokis will have pity/good sense of humor. My burning wish is to preserve this one and, when devs bring out the direwolf (!), show just him who's the boss with this thanny variant.

Variant b is even better. After unloading
1 LtGauss
2 ERLBL
2 ERMBL
2hs,jj,gecm,all-thanny-boy-goodies, causes global warming
one can expect shut down and be painlessly amputated from battlefield by, say... any heavy. JJ for extra laughs. Imagine the story of IS pilot in this attacking a cerppc novacat:
***
"... so I got angry at him like a sheep and bravely fired another shot, this time hitting his CT! My heat was critical so I had to wait and make my next shot count! I mean his CT is almost yellow. And then he spotted me and with sheer luck he successfully defeated me! The bastard was..."
"Wait wait... so how did he spot you? You said that you were well hidden, passive, you have gecm and he was passive by all accounts."
" I dunno. Those damn clanners are cheaters."
In the meantime, on the other side of the hill, will hidden and camping, providing warmth to neigburing beatstick and shadowcat, the tired clan novacat pilot chats with his teammates in arms:
*phew-phew-phew-phew* "HAHAHA! Look at that! Clean shot. Those damn atlasses can be really something if they attack in swarms."
"So what happened with that thanatos B? And how the hell did you spot h... wait. *SMACK!* That RAC atlas actually came close?! Die foul beast! *SMAAACK!!!* Man, i love beatsticks... ok all done. So what happened then?"
"So I pretend not to see clouds of smoke gushing all around and forest catching fire. I mean, the poor fella has gecm, gotta respect that one. I newer EWER saw that much heat generated from such few weapons. Anyway this one is really persistent and my paint was almost scratched. I had to do something."
"What did you do?"
"Well, I fired a single ppc at him, and he melted away trying to return fire. It was sick and i just had to put it down. Poor thanny. Remember when thanatos meant something back in 2.0?"
"Yea i remember. Poor thing."
***
LBX20
MRM30
x3 ERMBL
1 DHS; 1freeton,C3,GECM
Reasons this should not exist??
0
No reason at all. It should/will exist i just know it!
But would really like to see dual lbx 10 thanatos config. One arm 2x LBX 10, Other dual srm6 2xsmall pulse laser in torso.