You can also use "I". Trying to avoid pronouns can make it sound like a high school lab report with excessive passive voice (e.g. "The baking soda was mixed wit

You can also use "I". Trying to avoid pronouns can make it sound like a high school lab report with excessive passive voice (e.g. "The baking soda was mixed with the vinegar" vs. "I mixed the baking soda with the vinegar"). In this example, I might say "This seems very complicated to me. Would a simpler model work?". If I had something simpler in mind specifically I would suggest it.