Now you're making me want to read Subarashiki Hibi again. xD If I did, it'd be the 5th time I'd be reading it... H-hehehehehe... *obsessed* (❀◦‿◦)
In any case, glad to see you're enjoying it. Sca-自 is a genius~
Regarding Cross+Channel... pretty sure the difficulty lies within the original script and maybe partly through the shoddy translation. Mostly the script since Romeo deliberately writes in a roundabout method that is rather unconventional in comparison to anything else. That's what makes him and his works great to read through, though. (*‿*✿)
By the way, I'd recommend Kazoku Keikaku, as it's a pretty great eroge indeed written by Romeo. Well, I'm not sure, but I think Kana Imouto wasn't completely written by him... I could be wrong since I never looked into that one specifically.
Also, I do understand that you're not looking for anything untranslated, but I will say this because I'm currently reading it myself and have to let it be known. xD The eroge 'Saihate no Ima' is a spectacular work written by him that I feel surpasses or is at least on par with Cross+Channel. It's the most "Romeo-ish" thing I've read and its complexity is beyond anything else out there (except I/O of course, but wasn't he only a sub-writer to that?). Definitely recommend it for anyone pursuing Romeo if they're a huge, huge fan. Or like you said, if one's taking a "Tanaka Romeo journey".