Reg. all your concerns, I agree. While I love the idea that he could be coming back, I must express concern on how the writers are going to go about this - I mean, after 20 odd years, why now? ๐ Where has Om been for 20 years, why was he not around to help Paro when she was accused of his death? Besides, his coming back means that Trishna is off the hook, Krishna's death was in vain, Paro's entire journey as Janki was in vain, though of course it DID teach Paro herself some lessons...on top of that, as you rigtly say, it alludes to yet another change in Suyash's role/character.
But despite all this, I will be happy if he comes back. I am not one for Ekta's bringing-back-from-the-dead theory, and find it ridiculous, but there are only TWO characters in Ekta-world that I ever wanted back from the dead, and they were Om and Mukti. Having at least one of these two back would be a dream come true ๐ณ