Is it a dwarf flowering gum or a big one? Many gums affect the ground beneath them, not allowing other plant competition to grow there...except azaleas, rhododendrons and other acid loving plants can do well. Another idea is to think of some native grasses, there are some excellent decorative cultivars now that are very hardy too. Some of the small lomandras could be planted in clumps of varying heights and colours, also dianella silver streak would be pretty.

Can you take out one of the garden beds (front left) and do a smaller deck area to transition from the upper deck down to the paving. I think you need a much lighter colour to provide light and contrast with all the tropical plants. Agree yellow and orange are not helping create a relaxing outdoor area. You already have warm colours in the terracotta tile around the pool so a colour for the walls that cools them down, look for neutral tones in lighter blue/greys to reflect the pool. You can see the difference in the photo above which looks much lighter than in your photo with the dark brick and terracotta orange on the walls which just seems to suck the light out. Large pots can be in your favourite pops of colour to great interest and contrast. Good luck with your project.

Your house looks lovely, to fix your path, remove what is there at the moment, put down a layer of crushed rock, tamper it down until level, relay your pavers on top of this , you can gently tap with rubber mallet if any are a little uneven, spread your rocks back between pavers and to edge and it should be sturdy and fine, if you get the preparation (crushed rock and levelling) perfect to start with your path will do you well for many years

Hi, sorry I attached some to the post but see they are not showing. Will try again :)