3. You cannot do it. Codeshares on KE are not allowed. The relevant rule is:
ETA
4. I suspect that QR cannot put its codeshare flight number on the MH-operated flight, unless it has flown the passenger into KUL from DOH

Why not just drop hnd gmp altogether from your rtw and buy it on your own?

this is one of the option I am looking at, drop this segment means I save 1 surface segment and 1 air segment.
But, I will need to pay USD120 for change fee, am I right?
with this in mind, I am trying to hold it first, till I finalize the rest of my itinerary, then change it at one go

RTWs seem to be an exception to this. I've put plenty of random codeshares on my tickets that aren't related to my inbound flights and / or a connection with the codeshare carrier I'm using. I quite intentionally try to set them up to have as near zero AA, BA, and IB codes as possible, so do a lot of work looking for more advantageous codeshares to replace those where needed. I will certainly continue to do so until / unless AA reverses course and treats RTWs as Special Fares again. If they are treated as Special Fares again then they aren't nearly so punative on AA codes.

it is weird to see stand alone flights are codeshared. I saw mad-Cai on Iberia one segment only but can book it with aa code....

When you book it with partner code, is there any difference in taxes? For example I see ba flights have higher taxes than jl on hnd-lhr route but if I book jl flight with ba code, do I pay jl taxes or ba taxes? I assumed it is ba tax because the flight is booked as a ba flight instead of jl...the reason I am asking this is because ba flights earn substantially more Alaska miles than jl

Trying to change the date of my QF27 (SYD->SCL), which I booked as part of my DONEx, but facing a very sad picture in terms of availability.
According to expertflyer, the entire month of March 2025 is zeroed out on the flight for any business booking class but J and C. I know that the PoS might change things, but not optimistic that EG might have better availability than US.

Does anyone have experience with this route and the sales / booking class strategy from QF?
Is it likely that this will remain all zeroed out or is there hope for QF to release seats in the D booking class?

Real taxes, as paid to government and regulatory bodies, are exactly the same for every airline flying the same route with the same class of travel.
Airline carrier surcharges can vary with marketing and/or operating carrier. Hard to predict.
Do not confuse real taxes and YQ YR carrier surcharges (~100% airline profit)

are you getting the AA CS to allocate codeshare for you when you book the tickets?
i will certainly attempt again by emailing their twitter team.

IME the AA RTW desk will put any available codeshare on any flight, provided that there's availability in the proper fare bucket (L/D/A) on the codeshare. Note that it's not AA customer service, it's the RTW desk. I would guess that this does not apply to non-RTW tickets, which would be subject to the regular codesharing rules.

my ticket is RTW as well, when I called Qantas hotline, was told the QR codeshare didnt shown in their system, thus she cant book for me under QR, and can only book under the actual MH flight.

its QF. Take it with a grain of salt. HUCA.

Yet another reason to use the AA RTW desk. IME if a codeshare shows in EF, the AA RTW desk will have it. However, that doesn't mean that you'll be able to get it, even when the flight is visible under the codeshare number to AA. You need visibility plus inventory, and inventory showing in EF isn't always available to AA or other partners.

Quick question, if anyone has similar experience.
There are 2 pax under my current PNR booking, if I were to make any changes, for both pax together, assuming no fare changes.
do i need to pay the change fee of 125USD or 125USD x2?

I have been charged 125 per person even on one PNR.

From RWR2 RULE 3015
My view would be 1 x 125, as the change is one transaction. 1 PNR with 2 e-tckets