Ouch. That hurt. Heatran was only good for countering Genesect? I disagree my friend. Heatran had quite the usage statistics before the introduction to Genesect. In the August statistics, Heatran was in fact ranked 5th. After the introduction to Genesect he actually fell down to 6th (not huge but still).
Heatran ,over the generations, has given itself a very good title and has solidified itself well into B2W2 OU, despite all the new Pokemon. For starters, Heatran was blessed with an amazing typing, a great ability, a versatile movepool, a plethora of ways that it could be used, and it was granted the unique fact that it is so easy to throw in Heatran (synergistically speaking). Heatran is part Steel a beautiful typing in terms of defense. Unlike many other Steels, Heatran was given quite a viable alternate STAB. With Fire Blast STAB, or Lava Plume or even Magma Storm, it was granted the ability to roast other Steel types, Grass Types, Ice Types and Bug Types. But there's more. Heatran has Flash Fire. It grants him a beautiful immunity allowing him to check a great number of Pokemon. Heatran has also gained the title of being a problem for Sun teams. Their Fire moves will only benefit Heatran, and with a respectable base Sp.Attk along with Sun+Flash Fire+STAB, Heatran will be doing massive damage to Sun teams. Heatran was not only used for Genesect. Heatran ended up being a pretty decent check to Tornadus-Therian, if it was in a range where Superpower or Focus Blast wouldn't kill. Heatran also gave trouble to Jirachi, Venusaur (w/o EQ), Dragonite (if it hasn't boosted or carries FP), Latios, Latias, so forth. Heatran also has the great ability for being able to trap other weather inducers. I could keep on going and going, but Heatran really is a great Pokemon, that has much more use than checking Genesect.
Dugtrio won't drop much either, if at all. Dugtrio is used to trap and kill other weather inducers along with other troublesome Pokemon. The fact that Heatran will not drop after Genesect is gone, disproves your argument of Dugtrio falling because would fall.
Just understand that Heatran was, is and will be for quite some time, a solid Pokemon in the OU tier.
i never said heatran was not good.