Adding a concise background to the sentence, we can highlight that Raisio, a company in the food industry, has been undergoing strategic changes to improve its marketing approach.

In terms of sentiment, the statement about Raisio's food marketing being "reactive and inconsistent" reflects a negative tone, indicating potential challenges or setbacks in the company's previous marketing strategies.

Synthesizing the enhanced sentence, we get: "Amid strategic changes, Raisio's food marketing, as noted by Laavainen, used to be reactive and inconsistent, signaling past challenges in their approach."