Do you think that some hybrid highbreed have some of the powers the aliens they're mixed with? But not 100% accurate/right
There is always the possibility for that! I am not closing doors on this idea deliberatly, because its a writing freedom and literally anything can happen.
I doubt that omnitrix have created someting similar to amalgan kids (human x alien with full range of abilities), but I do headcanon that some of highbreed did get some biological quirks from the new DNA.
For example:
Atasian + Pyronite - They are that tropical plant you know, who needs really specific range of temperature otherwise they would feel uncomfortable. And they are pretty dramatic about that! Also their body temperature is much warmer than others due to their body producing more heat from changed metabolism and cuz of that, needs more food.
Atasian + vulpimancer - on top of having more enchanced power of smell (onbviously) they would probably have strong sense of movement around them thanks to growing "feelers" out of their body. Would be hard to catch them offguard!
Atasian + Galvanic mechamorp - and this one is tricky! Since atasians are plant based species and their technology based on bioengeeniring, at first glance mechamorphs dna would not give anything - just shiny skin and funky patterns. But once the person would get in contact with mechanical based technology, they would feel this nudge, instictual feeling of how this thing works, and would be pretty good and maintaining it due this quirk.
Atasian + thep khufans - Surprisingly, highbreeds with this dna doesnt show much of abilities of thep khufans itself, like stretching "bandages" and etc, simply because the plant structure of their biology not really allowing it, but! "Mummy" highbreeds shows unmatched resistance to any kind of radiation, rendering them almost immune to even the most deadly radiation length. Mostly because of protective layer they are producing over the body and powerful regeneration, which speeds up healing almost five times