User blog comment:Fliu/Chapter 946: Luffy's Next Big Step/@comment-180.191.122.111-20190622004046/@comment-2600:6C5D:5D00:1C9:C8C2:63C0:2869:1AA1-20190624131843

Luffy did remove the weak points of his first two gears. Luffy hardly used Shave when he is in Second Gear to prevent his heart from rupturing and shortening his life like it almost did on the Bridge of Hesitation against Lucci. For Third Gear, he no longer shrinks for a period of time now. The only problem is Fourth Gear and its burnout rate of Haki and exhaustion period.