Sorry to hear about your oscar, I can sympathise as I love my pair of oscars shortly before I got into planted tanks; it was what gave me the push to start a community aquarium, like I used to keep before I got into breeding fish and keeping monsters!
The hardscape looks good to me, except that it's a little bit empty on the left. If it was me, I'd have a smaller pile of rocks or wood on that side to balance it; not too much so as to take focus away from what you already have but just enough so that it doesn't look so empty.
Good luck! I look forward to seeing what you come up with and I hope you're enjoying it as much as I have been since I started a few weeks ago!
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