Advice needed on award ticket.

I currently have a UA F *A award w/ a return from MLE to LAX via SIN in SQ F (both directions in SQ F ^). I’m so excited, I don’t know whether to be more excited to go to the Maldives or experience SQ F for the first time.

So here’s my dilemma, I wanted to add a few more days to my trip and to do so would cause me to give up my return trip and book an award w/ the following options, and I needed some advice to see if I’m just plane crazy or just have OCD.

Option #1 Current reservation: SQ MLE-SIN (C) to SQ SIN-NRT-LAX (F),

Option #2 SQ MLE-SIN (Y) to SQ SIN-ICN (Y) to OZ ICN-LAX (F) this would be on the 744 and I understand that there is a chance that this gets swapped to the combi aircraft.

Option #3 SQ MLE-SIN (Y) to SQ SIN-BKK (C) to TG BKK-LAX (C). Since I’m paying F miles this seems like the least attractive option but if the C product is okay then I might not mind.

I have never flown SQ in Y and C, never OZ or TG, so I don’t know what to expect, I’ve been through so many threads and have seen so many reviews my head is spinning. I just need some good advice on whether I should stick w/ what I have which I can live w/ or extend my vacation by 2 days and do one of the other trips.