I think you'll find that Gisela is too slow for most competitive events. That's likely why most people hate on her.
Overall, I believe you have potential here. Champion of the Parish is still very popular with RW human decks. In order to maximize on its triggered ability, consider replacing Lingering Souls with Gather the Townsfolk. Of course, if running tokens, you really want Intangible Virtue to give them a buff and vigilance.
I run Intangible Virtue in my populate deck. It's great but a waste in this deck, too many other things going on just for a possible 12 tokens. The reality is that I will only get 4 to 8 tokens out at best. If I had more token production, it would be there. I was running Gather the Townsfolk and thought I'd try Lingering Souls. Playtesting showed I need to put it back, the flying pings weren't nearly as effective as buffing the champion.
If you believe it is likely that you will get seven mana for Gisela, you should at least ponder whether or not Akroma's Memorial might be a better way to spend that mana.
Believe it or not, Friday, I almost always had enough mana to drop Gisela. And I did every time I had it. I only have one memorial and I don't feel like buying more, but it's a great card for sure
Best of luck! Let us know what you end up with, and how it works out.
I went 2-2. My losses were my fault, I had 6 mana, played Sublime Archangel with a counterflux in my hand, guy top decked entreat the angels and threw out 5, didn't have the one mana I needed to counter it and lost because of that. Another time I drew 3 mana in my hand and that was all I drew rest of the game. The other match was a red/white human aggro, it just mooved waaay too fast.
May want to consider use of Aurelia, the Warleader
And Gisela, you meant and Gisela lol