Sandbox goes in depth about this.
I believe it doesn't change anything. Xi is now replacing these people with his own yes-men which is just as bad specially during war. I think the PLA corruption is worse than Russia's and would have been exposed like Russia was/is if they attacked Taiwan only difference is Taiwan actually has a modern military and teeth to strike the mainland many times. Conservatively this is going to take Xi a decade to root out corruption to the point where it won't fare as bad as Russia's military has in Ukraine but only if Xi does it right by putting non yes-men and people of merit which means putting people that aren't political "friendly" which we know that won't happened. Meanwhile Taiwan will only get better in its defenses and offensive capabilities.
It actually changes things a lot. Typically overarching strategy is decided by only a handful of people, not your run-of-the-mill general. And communist militaries are run from the top, so only a few people need to have enough "integrity," probably 'cause they have been fed or are treated well.
And PLAGF's reorganization has pushed decision-making at the tactical level down the chain. So you now have a colonel or major general leading the field unit, and a lt. general commanding the corps. Since the largest field unit is now a brigade, the unit becomes tactically more efficient, this results in junior officers being able to make better decisions. So even if the major and lt. generals are not up to the task, the mistakes they make can be corrected on the field by junior officers. But for that to happen, the junior officers need sufficient resources. So, if Xi deals with the corruption problem adequately, the brigades only become all the more effective, compensating for the increase in yes-men at the top.
And if they have started discovering problems as of 2022-23, it means they are working to eradicate both political rivals and make the system more efficient as part of their pre-war preparations. And any problems found can be fixed before they go to war. Assuming an invasion in 2026 or 2027, that's enough time to plug gaps.
This is how bad it is for China's military in any invasion of Taiwan... Imagine if Ukraine had Taiwan's military capabilities? Meaning its air force, navy and cruise missile capabilities. Russia's current frontline map would totally look different. I don't see China's conventional capability any different from Russia's pre-war. Pre-war Russian military looked very pretty and capable on camera and parades just like China's military does difference is China not only would be taking on a competent Taiwan military but US, Nippon and Australia's navy and air force.
If Ukraine had militarized to Taiwan's level, either the Russians wouldn't have attacked in the first place, would have presented itself as enough of a deterrence, or they would have ended the war long ago 'cause they would know exactly how much military power was necessary.
The Russians are stuck in this quagmire 'cause they miscalculated the resources they needed to mobilize.
Typically, for a great power or superpower to win a war, they need to know exactly how many resources to mobilize, post which it's just a numbers game. And to achieve deterrence, you just mobilize enough resources that it becomes too expensive an affair for the larger power.
For example, when it comes to Taiwan, the US is the smaller power. When it comes to SoKo, the US is the larger power.