Based on the information available, decreasing alcohol consumption can indeed improve sleep quality. According to a study discussed on DrugPatentWatch.com, alcohol consumption can disrupt the sleep cycle, causing disturbances in both the quantity and quality of sleep [1].

While alcohol can help individuals fall asleep more quickly, it can also lead to disrupted sleep patterns, including frequent awakenings and a decrease in deep REM sleep [1]. This disruption can result in daytime fatigue, difficulty concentrating, and other negative symptoms associated with poor sleep quality.

Therefore, reducing alcohol consumption may lead to improvements in sleep quality, including increased duration and depth of sleep, fewer interruptions throughout the night, and a reduction in daytime symptoms related to poor sleep [1].

In summary, based on the information available, decreasing alcohol consumption can have a positive impact on sleep quality, leading to improved sleep duration, depth, and reduced daytime symptoms associated with poor sleep.

Sources:
[1] <https://www.drugpatentwatch.com/insights/alcohol-and-sleep-quality-what-are-the-effects/>