I've posted sporadically about Shiva and Raavi whenever an episode makes me want to pen my thoughts. I was just going back through them, and I could see how my understanding of these characters evolved as the story progressed. I'm not sure if anyone's interested, but since some very kind people here have told me they're an okay read, I thought of compiling them here as I go if anyone else wants to read through the timeline.
In order of date from oldest:
https://www.indiaforums.com/forum/pandya-store/5218196/why-so-harsh-shiva - an exploration of Shiva's harsh behaviour with Raavi
Wedding episodes:
https://www.indiaforums.com/forum/pandya-store/5219004/todays-epi-and-raavi-shiva - Raavi's suicide and Shiva's empathy
https://www.indiaforums.com/forum/pandya-store/5219264/ahh-such-a-feelsy-episode - analysis of angsty wedding episode
https://www.indiaforums.com/forum/pandya-store/5222348/chole-andolan-ft-shivi?pn=2 - Chole Andolan ft ShiVi, an adorable anecdote and food for thought
https://www.indiaforums.com/forum/pandya-store/5224483/does-shiva-like-raavi - Does Shiva like Raavi? (Not the post but the discussion is great)
https://www.indiaforums.com/forum/pandya-store/5224518/a-lot-of-fangirling-a-little-analysis - Shiva, Raavi and a laugh of infectious joy
https://www.indiaforums.com/forum/pandya-store/5225542/shiva-and-raavi-what-are-they-really - Shiva and Raavi, what are they, really?
Update: linked the episode specific posts above. Will update if I make future posts too :)