I think the reason Awesomes aren't seen as much right now is that their original role is overshadowed by metagame and mech customization which allows the Stalker to be much better than an Awesome than was originally intended.
Here is the description of the Stalker, courtesy of Sarna:
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"The 'Mech is built mounting weapons with overlapping ranges of fire that allow it to increase the amount of damage it can deal to an enemy 'Mech as it closes to shorter range. The Stalker is also commonly used to penetrate enemy lines and attack enemy hard points relying on its thick armor for protection."
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"The Stalker's weapons assortment is built to increase damage as it closes with its target. The Stalker's long range weapons are two Jackson B5c LRM-10launchers. These provide the Stalker with its longest-range punch and allow it to give indirect fire support when needed. At shorter range the Stalker next brings its two Magna Mk III Large Lasers to bear on its target. For close ranges, the Stalker carries four Magna Mk II Medium Lasers. Finally, it mounts two Thunderstroke SRM-6 launchers which enable it to take advantage of any weak spots in the enemy’s armor."
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"The Stalker's largest problem lies in its heat management. It originally used a special computer to make the best use of its weaponry with regards to the heat it would generate. Unfortunately this program is now lost and a MechWarrior should stagger fire of its weapons to avoid overheating problems."
As you may have noted, it doesn't say anywhere about the Stalker being a walking PPC cannon...
Because of mech customization, a lack of balance in current weapons, no penalties for overheating, and current metagame geared towards fast-high damaging alphas, the Stalker has taken over the role that the Awesome had. I hate to say this but most players playing by meta view taking the Awesome as a 5-ton disadvantage since the Stalker can carry 4-6 PPCs along with additional armor and heat sinks. Hopefully, as the game progresses and changes are made, the Awesome can take its role back as the PPC support and the Stalker can go back to being the slow-moving, creeping death build. As a Stalker pilot I miss the stagger fire that I had to use on my variants which not only allowed me to fire from different distances but gave me a challenge as well.
This can be applied to other mechs as well, right now there are certain mechs or variants that are just better than any other weight type available because of what the game demands right now. Boating and specialization is the name of the game right now, the builds that can pack the most lasers and do the most damage are rewarded the most while mechs that try to balance and blend their weapons are meager or decent at best. Until this area is fixed the Awesome's only role is to collect dust.