maybe go onto their facebook page to see what their existing customers are saying? as Aaron mentioned they stopped dealing with the broker market a long time ago.
They did reduce them recently but they might respond to the recent movements by other lenders in the last couple of weeks. Currently 5 year fixed is citibank at 5.35 (comp 5.66 and free rate lock) and ING at 5.39 (comp 5.47) are the better options.
if you really want to stay with CBA then keep trying them weekly. if you dont mind moving then st george, suncorp and ANZ are all 4.99 or below. if you move you might also be able to get a bigger discount off any variable rate split.
the swap rates have moved back to where they were around a month ago so maybe a bit more but would have to see how everything goes in the coming weeks and months. 4.89 for 2 years and 4.99 for 3 years is really good value.
with that strategy i would consider fixing the loans. You might want to consider a mixture of 3 and 5 year rates to balance it out. there is some 5 year fixed rates at 5.39% so it would be the same repayment as your variable.
ok with the LMI being paid you made the right decision. No one can pick the bottom of the rate cycle so dont worry about that as their are other benefits to fixed rates.