100% correct, another dip would be an amazing opportunity for bitcoiners to buy before the halving because for sure after the halving there's gonna be a bullish run, one like none we've ever experienced before. Every dip is an opportunity for every bitcoiners to prepare for a bullish trend. So what could be better than a dip before the halving? 
Sure. People who still have the intention to buy Bitcoin and prepare their asset, will be happy with another dip. They will try to buy again and again, they will fill their bags as long as there is still enough time. But for people who already prepared their assets and no longer interested to buy, they won't care with another dip. They even may feel inpatient to see more dips, they surely expect the price of Bitcoin to skyrocket soon. So, not every Bitcoiner feels happy with another dip, it depends on their situation.