Increase size of ext2 beyond 1.5GB

I have a rooted LG-D520 (Optimus F3Q) running Android 4.1.2. The internal memory that came with the phone was so small that I installed an 8GB SD card. I formatted it using MiniTool Partition Wizard with 1.5GB of ext2 (the rest is FAT32). Using Link2SD I've moved many of my apps over to the ext2 partition. I do *not* have a ton of apps (they just seem to keep getting bigger), yet I only have 5% space left on the ext2. My internal memory has 27% left (355MB), but I've had to delete a lot of stuff to make room. I'm only using a small portion of the 5.9GB FAT32 partition, so I'm wondering if... 1. I can increase the size of the ext2 beyond 1.5GB. Is there a maximum size and, if so, what is it? Can I repartition without losing my apps & data or do I need to backup, format and start over? 2. I can add another ext2 partition to my SD card and load apps into there. Can you have multiple ext2 partitions and, if so, would that work with Link2SD? 3. Are there any other options ? This has been a frustrating endeavor and it's unbelievable the lengths you have to go to in order to do basic stuff on an Android phone, so I'd appreciate any advice.