We don't generally believe these countries will reform their way to socialism. Revolutionary means by which socialism is established will still likely be required, even in a state like Russia where the KPRF occupies seats in the Duma.
I believe the easiest way to connect your perspective with ours is in tying your stated concept of "support for utility" with the English term "critical support." The "critical" refers to, essentially, the fact that we do not support their actual systems in the long term, merely their actions in relation to imperialism and neocolonialism. This is a strategic form of support.
With respect to "Actually Existing Socialism," such as the PRC, DPRK, Vietnam, Laos, former USSR, and Cuba, we simply state that we support them. This does not mean we believe any of these are perfect and don't critique them, but instead that support is more broad, general, and aligned with the actual mode of production and distribution.