SharePoint 2010 rich text editing tool styles

I came across a scenario where my client wants SharePoint extranet site contents look and feel consistent. The site have many sub sites and which lot of publishing pages, editors can create pages, add content editor web part and add contents. The request routed to me about deleting some custom styles from content editing tool

Potentially excessive number of SPRequest objects, SharePoint error

I got this error in ULS log file while using one SharePoint application which was developed by third party. I have checked the code and it was disposing the SP objects correctly. The site was running really slow, and it takes about 40 seconds to load the home page. Site structure: Our application has 5

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